CVE-2024-49868: btrfs: fix a NULL pointer dereference when failed to start a new trasacntion

Published Oct 21, 2024
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix a NULL pointer dereference when failed to start a new trasacntion

[BUG] Syzbot reported a NULL pointer dereference with the following crash:

FAULTINJECTION: forcing a failure. starttransaction+0x830/0x1670 fs/btrfs/transaction.c:676 preparetorelocate+0x31f/0x4c0 fs/btrfs/relocation.c:3642 relocateblockgroup+0x169/0xd20 fs/btrfs/relocation.c:3678 ... BTRFS info (device loop0): balance: ended with status: -12 Oops: general protection fault, probably for non-canonical address 0xdffffc00000000cc: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000660-0x0000000000000667] RIP: 0010:btrfsupdaterelocroot+0x362/0xa80 fs/btrfs/relocation.c:926 Call Trace: <TASK> commitfsroots+0x2ee/0x720 fs/btrfs/transaction.c:1496 btrfscommittransaction+0xfaf/0x3740 fs/btrfs/transaction.c:2430 delbalanceitem fs/btrfs/volumes.c:3678 [inline] resetbalancestate+0x25e/0x3c0 fs/btrfs/volumes.c:3742 btrfsbalance+0xead/0x10c0 fs/btrfs/volumes.c:4574 btrfsioctlbalance+0x493/0x7c0 fs/btrfs/ioctl.c:3673 vfsioctl fs/ioctl.c:51 [inline] dosysioctl fs/ioctl.c:907 [inline] sesysioctl+0xf9/0x170 fs/ioctl.c:893 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xf3/0x230 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe+0x77/0x7f

[CAUSE] The allocation failure happens at the starttransaction() inside preparetorelocate(), and during the error handling we call unsetreloccontrol(), which makes fsinfo->balancectl to be NULL.

Then we continue the error path cleanup in btrfsbalance() by calling resetbalancestate() which will call delbalanceitem() to fully delete the balance item in the root tree.

However during the small window between setreloccontrl() and unsetreloccontrol(), we can have a subvolume tree update and created a relocroot for that subvolume.

Then we go into the final btrfscommittransaction() of delbalanceitem(), and into btrfsupdaterelocroot() inside commitfsroots().

That function checks if fsinfo->relocctl is in the mergereloctree stage, but since fsinfo->relocctl is NULL, it results a NULL pointer dereference.

[FIX] Just add extra check on fsinfo->relocctl inside btrfsupdaterelocroot(), before checking fsinfo->relocctl->mergereloctree.

That DEADRELOCTREE handling is to prevent further modification to the reloc tree during merge stage, but since there is no relocctl at all, we do not need to bother that.

Other sources

This CVE was automatically created from a reference found in an email or other text. If you are reading this, then this CVE entry is probably erroneous, since this text should be replaced by the official CVE description automatically.

— Launchpad

Affected Software

213 affected componentsFixes available
Linux Linux kernel<5.10.227
Linux Linux kernel>=5.11<5.15.168
Linux Linux kernel>=5.16<6.1.113
Linux Linux kernel>=6.2<6.6.55
Linux Linux kernel>=6.7<6.10.14
Linux Linux kernel>=6.11<6.11.3
debian/linux<6.1.115-1
6.1.115-1
debian/linux<6.11.4-1
6.11.4-1
debian/linux<6.11.4-1
6.11.4-1
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-azure*
ubuntu/linux-lts-xenial*
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-aws-hwe*
ubuntu/linux-azure*
ubuntu/linux-gcp*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm*
ubuntu/linux-oracle*
ubuntu/linux-fips*
ubuntu/linux-fips*
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1142.152~18.04.1
5.4.0-1142.152~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-4.15*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1145.152~18.04.1
5.4.0-1145.152~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-4.15*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1143.152~18.04.1
5.4.0-1143.152~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-208.228~18.04.1
5.4.0-208.228~18.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4<5.4.0-1086.91~18.04.1
5.4.0-1086.91~18.04.1
ubuntu/linux-kvm*
ubuntu/linux-oem*
ubuntu/linux-oracle*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1138.147~18.04.1
5.4.0-1138.147~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1129.142~18.04.1
5.4.0-1129.142~18.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-208.228
5.4.0-208.228
ubuntu/linux-aws<5.4.0-1140.150
5.4.0-1140.150
ubuntu/linux-aws-5.15<5.15.0-1073.79~20.04.1
5.15.0-1073.79~20.04.1
ubuntu/linux-azure<5.4.0-1145.152
5.4.0-1145.152
ubuntu/linux-azure-5.15<5.15.0-1078.87~20.04.1
5.15.0-1078.87~20.04.1
ubuntu/linux-bluefield<5.4.0-1099.106
5.4.0-1099.106
ubuntu/linux-gcp<5.4.0-1143.152
5.4.0-1143.152
ubuntu/linux-gcp-5.15<5.15.0-1072.80~20.04.1
5.15.0-1072.80~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-127.137~20.04.1
5.15.0-127.137~20.04.1
ubuntu/linux-ibm<5.4.0-1086.91
5.4.0-1086.91
ubuntu/linux-ibm-5.15<5.15.0-1066.69~20.04.1
5.15.0-1066.69~20.04.1
ubuntu/linux-intel-iotg-5.15<5.15.0-1071.77~20.04.1
5.15.0-1071.77~20.04.1
ubuntu/linux-iot<5.4.0-1048.51
5.4.0-1048.51
ubuntu/linux-kvm<5.4.0-1127.136
5.4.0-1127.136
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-127.137~20.04.1
5.15.0-127.137~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1032.32~20.04.1
5.15.0-1032.32~20.04.1
ubuntu/linux-oracle<5.4.0-1138.147
5.4.0-1138.147
ubuntu/linux-oracle-5.15<5.15.0-1071.77~20.04.1
5.15.0-1071.77~20.04.1
ubuntu/linux-raspi<5.4.0-1129.142
5.4.0-1129.142
ubuntu/linux-riscv-5.15<5.15.0-1069.73~20.04.1
5.15.0-1069.73~20.04.1
ubuntu/linux-xilinx-zynqmp<5.4.0-1058.62
5.4.0-1058.62
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-gkeop-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1140.151+fips1
5.4.0-1140.151+fips1
ubuntu/linux-azure-fips<5.4.0-1145.152+fips1
5.4.0-1145.152+fips1
ubuntu/linux-fips<5.4.0-1116.126
5.4.0-1116.126
ubuntu/linux-gcp-fips<5.4.0-1143.152+fips1
5.4.0-1143.152+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-127.137
5.15.0-127.137
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1073.79
5.15.0-1073.79
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8<6.8.0-1023.25~22.04.1
6.8.0-1023.25~22.04.1
ubuntu/linux-azure<5.15.0-1078.87
5.15.0-1078.87
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8<6.8.0-1025.30~22.04.1
6.8.0-1025.30~22.04.1
ubuntu/linux-azure-fde<5.15.0-1078.87.1
5.15.0-1078.87.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1072.80
5.15.0-1072.80
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8<6.8.0-1024.26~22.04.1
6.8.0-1024.26~22.04.1
ubuntu/linux-gke<5.15.0-1070.76
5.15.0-1070.76
ubuntu/linux-gkeop<5.15.0-1056.63
5.15.0-1056.63
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-hwe-6.8<6.8.0-57.59~22.04.1
6.8.0-57.59~22.04.1
ubuntu/linux-ibm<5.15.0-1066.69
5.15.0-1066.69
ubuntu/linux-ibm-6.8<6.8.0-1023.23~22.04.1
6.8.0-1023.23~22.04.1
ubuntu/linux-intel-iotg<5.15.0-1071.77
5.15.0-1071.77
ubuntu/linux-kvm<5.15.0-1070.75
5.15.0-1070.75
ubuntu/linux-lowlatency<5.15.0-127.137
5.15.0-127.137
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8<6.8.0-54.56.1~22.04.1
6.8.0-54.56.1~22.04.1
ubuntu/linux-nvidia<5.15.0-1068.69
5.15.0-1068.69
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8<6.8.0-1022.25~22.04.2
6.8.0-1022.25~22.04.2
ubuntu/linux-nvidia-tegra<5.15.0-1032.32
5.15.0-1032.32
ubuntu/linux-nvidia-tegra-igx<5.15.0-1020.20
5.15.0-1020.20
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1071.77
5.15.0-1071.77
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8<6.8.0-1020.21~22.04.1
6.8.0-1020.21~22.04.1
ubuntu/linux-raspi<5.15.0-1066.69
5.15.0-1066.69
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-riscv-6.8<6.8.0-53.55.1~22.04.1
6.8.0-53.55.1~22.04.1
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1039.43
5.15.0-1039.43
ubuntu/linux-bluefield<5.15.0-1057.59
5.15.0-1057.59
ubuntu/linux-intel-iot-realtime<5.15.0-1066.68
5.15.0-1066.68
ubuntu/linux-realtime<5.15.0-1074.82
5.15.0-1074.82
ubuntu/linux-realtime-6.8<6.8.1-1016.17~22.04.1
6.8.1-1016.17~22.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1073.79+fips1
5.15.0-1073.79+fips1
ubuntu/linux-azure-fips<5.15.0-1078.87+fips1
5.15.0-1078.87+fips1
ubuntu/linux-fips<5.15.0-127.137+fips1
5.15.0-127.137+fips1
ubuntu/linux-gcp-fips<5.15.0-1072.80+fips1
5.15.0-1072.80+fips1
ubuntu/linux<6.8.0-54.56
6.8.0-54.56
ubuntu/linux-aws<6.8.0-1023.25
6.8.0-1023.25
ubuntu/linux-azure<6.8.0-1025.30
6.8.0-1025.30
ubuntu/linux-azure-6.11<6.11.0-1012.12~24.04.1
6.11.0-1012.12~24.04.1
ubuntu/linux-azure-nvidia<6.8.0-1014.15
6.8.0-1014.15
ubuntu/linux-gcp<6.8.0-1024.26
6.8.0-1024.26
ubuntu/linux-gcp-6.11<6.11.0-1011.11~24.04.1
6.11.0-1011.11~24.04.1
ubuntu/linux-gke<6.8.0-1019.23
6.8.0-1019.23
ubuntu/linux-gkeop<6.8.0-1006.8
6.8.0-1006.8
ubuntu/linux-ibm<6.8.0-1022.22
6.8.0-1022.22
ubuntu/linux-lowlatency<6.8.0-54.56.1
6.8.0-54.56.1
ubuntu/linux-nvidia<6.8.0-1022.25
6.8.0-1022.25
ubuntu/linux-nvidia-6.11<6.11.0-1007.7
6.11.0-1007.7
ubuntu/linux-nvidia-lowlatency<6.8.0-1022.25.2
6.8.0-1022.25.2
ubuntu/linux-oem-6.11<6.11.0-1015.15
6.11.0-1015.15
ubuntu/linux-oem-6.8<6.8.0-1024.24
6.8.0-1024.24
ubuntu/linux-oracle<6.8.0-1020.21
6.8.0-1020.21
ubuntu/linux-raspi<6.8.0-1019.23
6.8.0-1019.23
ubuntu/linux-realtime*
ubuntu/linux-riscv<6.8.0-53.55.1
6.8.0-53.55.1
ubuntu/linux-xilinx<6.8.0-1017.18
6.8.0-1017.18
ubuntu/linux-raspi-realtime<6.8.0-2018.19
6.8.0-2018.19
ubuntu/linux-realtime<6.8.1-1016.17
6.8.1-1016.17
ubuntu/linux-fips<6.8.0-78.78+fips1
6.8.0-78.78+fips1
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.115-1
  2. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.11.4-1
  3. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  4. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1142.152~18.04.1
  5. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1145.152~18.04.1
  6. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1143.152~18.04.1
  7. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-208.228~18.04.1
  8. Upgrade

    Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1086.91~18.04.1
  9. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1138.147~18.04.1
  10. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1129.142~18.04.1
  11. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-208.228
  12. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1140.150
  13. Upgrade

    Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1073.79~20.04.1
  14. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1145.152
  15. Upgrade

    Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1078.87~20.04.1
  16. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.4.0-1099.106
  17. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1143.152
  18. Upgrade

    Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1072.80~20.04.1
  19. Upgrade

    Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-127.137~20.04.1
  20. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1086.91
  21. Upgrade

    Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1066.69~20.04.1
  22. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1071.77~20.04.1
  23. Upgrade

    Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.

    Fixed in 5.4.0-1048.51
  24. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1127.136
  25. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-127.137~20.04.1
  26. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1032.32~20.04.1
  27. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1138.147
  28. Upgrade

    Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1071.77~20.04.1
  29. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1129.142
  30. Upgrade

    Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1069.73~20.04.1
  31. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1058.62
  32. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1140.151+fips1
  33. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1145.152+fips1
  34. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1116.126
  35. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1143.152+fips1
  36. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.15.0-127.137
  37. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.15.0-1073.79
  38. Upgrade

    Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1023.25~22.04.1
  39. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.15.0-1078.87
  40. Upgrade

    Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1025.30~22.04.1
  41. Upgrade

    Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.

    Fixed in 5.15.0-1078.87.1
  42. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1072.80
  43. Upgrade

    Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1024.26~22.04.1
  44. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 5.15.0-1070.76
  45. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.15.0-1056.63
  46. Upgrade

    Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-57.59~22.04.1
  47. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1066.69
  48. Upgrade

    Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1023.23~22.04.1
  49. Upgrade

    Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.

    Fixed in 5.15.0-1071.77
  50. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1070.75
  51. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.15.0-127.137
  52. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-54.56.1~22.04.1
  53. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 5.15.0-1068.69
  54. Upgrade

    Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1022.25~22.04.2
  55. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.

    Fixed in 5.15.0-1032.32
  56. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.

    Fixed in 5.15.0-1020.20
  57. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.15.0-1071.77
  58. Upgrade

    Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1020.21~22.04.1
  59. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.15.0-1066.69
  60. Upgrade

    Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-53.55.1~22.04.1
  61. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1039.43
  62. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.15.0-1057.59
  63. Upgrade

    Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1066.68
  64. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1074.82
  65. Upgrade

    Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.1-1016.17~22.04.1
  66. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1073.79+fips1
  67. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1078.87+fips1
  68. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-127.137+fips1
  69. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1072.80+fips1
  70. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 6.8.0-54.56
  71. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 6.8.0-1023.25
  72. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 6.8.0-1025.30
  73. Upgrade

    Upgrade ubuntu/linux-azure-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1012.12~24.04.1
  74. Upgrade

    Upgrade ubuntu/linux-azure-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1014.15
  75. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 6.8.0-1024.26
  76. Upgrade

    Upgrade ubuntu/linux-gcp-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1011.11~24.04.1
  77. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 6.8.0-1019.23
  78. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 6.8.0-1006.8
  79. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 6.8.0-1022.22
  80. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-54.56.1
  81. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1022.25
  82. Upgrade

    Upgrade ubuntu/linux-nvidia-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1007.7
  83. Upgrade

    Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-1022.25.2
  84. Upgrade

    Upgrade ubuntu/linux-oem-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1015.15
  85. Upgrade

    Upgrade ubuntu/linux-oem-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1024.24
  86. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 6.8.0-1020.21
  87. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 6.8.0-1019.23
  88. Upgrade

    Upgrade ubuntu/linux-riscv to a version that resolves this vulnerability.

    Fixed in 6.8.0-53.55.1
  89. Upgrade

    Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.

    Fixed in 6.8.0-1017.18
  90. Upgrade

    Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.0-2018.19
  91. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.1-1016.17
  92. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-78.78+fips1
  93. Compensating control

    In btrfs_update_reloc_root(), add an extra check that fs_info->reloc_ctl is non-NULL before checking fs_info->reloc_ctl->merge_reloc_tree.

Event History

Oct 21, 2024
CVE Published
via MITRE·06:01 PM
Data Sourced
via MITRE·06:01 PM
Description
Data Sourced
via OSV·06:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2024-49868?

CVE-2024-49868 is categorized as a high-severity vulnerability.

2

How do I fix CVE-2024-49868?

To fix CVE-2024-49868, upgrade to a non-vulnerable version of the Linux kernel as specified in the security patch.

3

Which versions of the Linux kernel are affected by CVE-2024-49868?

CVE-2024-49868 affects Linux kernel versions from 5.11 up to 6.10.14.

4

What type of vulnerability is CVE-2024-49868?

CVE-2024-49868 is a NULL pointer dereference vulnerability in the Linux kernel.

5

What can happen if CVE-2024-49868 is exploited?

Exploitation of CVE-2024-49868 can lead to a system crash or denial of service.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203