CVE-2021-47576: scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select()

Published Jun 19, 2024
·
Updated

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

scsi: scsidebug: Sanity check block descriptor length in respmodeselect()

In respmodeselect() sanity check the block descriptor len to avoid UAF.

BUG: KASAN: use-after-free in respmodeselect+0xa4c/0xb40 drivers/scsi/scsidebug.c:2509 Read of size 1 at addr ffff888026670f50 by task scsicmd/15032

CPU: 1 PID: 15032 Comm: scsicmd Not tainted 5.15.0-01d0625 #15 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Call Trace: <TASK> dumpstacklvl+0x89/0xb5 lib/dumpstack.c:107 printaddressdescription.constprop.9+0x28/0x160 mm/kasan/report.c:257 kasanreport.cold.14+0x7d/0x117 mm/kasan/report.c:443 asanreportload1noabort+0x14/0x20 mm/kasan/reportgeneric.c:306 respmodeselect+0xa4c/0xb40 drivers/scsi/scsidebug.c:2509 scheduleresp+0x4af/0x1a10 drivers/scsi/scsidebug.c:5483 scsidebugqueuecommand+0x8c9/0x1e70 drivers/scsi/scsidebug.c:7537 scsiqueuerq+0x16b4/0x2d10 drivers/scsi/scsilib.c:1521 blkmqdispatchrqlist+0xb9b/0x2700 block/blk-mq.c:1640 blkmqscheddispatchrequests+0x28f/0x590 block/blk-mq-sched.c:325 blkmqscheddispatchrequests+0x105/0x190 block/blk-mq-sched.c:358 blkmqrunhwqueue+0xe5/0x150 block/blk-mq.c:1762 blkmqdelayrunhwqueue+0x4f8/0x5c0 block/blk-mq.c:1839 blkmqrunhwqueue+0x18d/0x350 block/blk-mq.c:1891 blkmqschedinsertrequest+0x3db/0x4e0 block/blk-mq-sched.c:474 blkexecuterqnowait+0x16b/0x1c0 block/blk-exec.c:63 sgcommonwrite.isra.18+0xeb3/0x2000 drivers/scsi/sg.c:837 sgnewwrite.isra.19+0x570/0x8c0 drivers/scsi/sg.c:775 sgioctlcommon+0x14d6/0x2710 drivers/scsi/sg.c:941 sgioctl+0xa2/0x180 drivers/scsi/sg.c:1166 x64sysioctl+0x19d/0x220 fs/ioctl.c:52 dosyscall64+0x3a/0x80 arch/x86/entry/common.c:50 entrySYSCALL64afterhwframe+0x44/0xae arch/x86/entry/entry64.S:113

Affected Software

126 affected componentsFixes available
Linux Linux kernel<4.9.294
Linux Linux kernel>=4.10<4.14.259
Linux Linux kernel>=4.15<4.19.222
Linux Linux kernel>=4.20<5.4.168
Linux Linux kernel>=5.5<5.10.88
Linux Linux kernel>=5.11<5.15.11
ubuntu/linux-azure<4.15.0-1131.144~14.04.1
4.15.0-1131.144~14.04.1
ubuntu/linux*
ubuntu/linux-aws<4.4.0-1145.151
4.4.0-1145.151
ubuntu/linux-lts-xenial<4.4.0-270.304~14.04.1
4.4.0-270.304~14.04.1
ubuntu/linux<4.4.0-270.304
4.4.0-270.304
ubuntu/linux-aws<4.4.0-1183.198
4.4.0-1183.198
ubuntu/linux-aws-hwe<4.15.0-1120.128~16.04.1
4.15.0-1120.128~16.04.1
ubuntu/linux-azure<4.15.0-1131.144~16.04.1
4.15.0-1131.144~16.04.1
ubuntu/linux-gcp<4.15.0-1116.130~16.04.1
4.15.0-1116.130~16.04.1
ubuntu/linux-hwe<4.15.0-169.177~16.04.1
4.15.0-169.177~16.04.1
ubuntu/linux-kvm<4.4.0-1146.157
4.4.0-1146.157
ubuntu/linux-oracle<4.15.0-1087.95~16.04.1
4.15.0-1087.95~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1115.122
4.4.0-1115.122
ubuntu/linux-fips*
ubuntu/linux<4.15.0-169.177
4.15.0-169.177
ubuntu/linux-aws<4.15.0-1121.129
4.15.0-1121.129
ubuntu/linux-aws-5.4<5.4.0-1069.73~18.04.1
5.4.0-1069.73~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1131.144
4.15.0-1131.144
ubuntu/linux-azure-5.4<5.4.0-1073.76~18.04.1
5.4.0-1073.76~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1116.130
4.15.0-1116.130
ubuntu/linux-gcp-5.4<5.4.0-1068.72~18.04.1
5.4.0-1068.72~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-105.119~18.04.1
5.4.0-105.119~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1018.20~18.04.1
5.4.0-1018.20~18.04.1
ubuntu/linux-kvm<4.15.0-1107.109
4.15.0-1107.109
ubuntu/linux-oracle<4.15.0-1087.95
4.15.0-1087.95
ubuntu/linux-oracle-5.4<5.4.0-1067.72~18.04.1
5.4.0-1067.72~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1056.63~18.04.1
5.4.0-1056.63~18.04.1
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2061.63
4.15.0-2061.63
ubuntu/linux-azure-fips<4.15.0-2043.47
4.15.0-2043.47
ubuntu/linux-fips<4.15.0-1078.87
4.15.0-1078.87
ubuntu/linux-gcp-fips<4.15.0-2026.28
4.15.0-2026.28
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-105.119
5.4.0-105.119
ubuntu/linux-aws<5.4.0-1069.73
5.4.0-1069.73
ubuntu/linux-azure<5.4.0-1073.76
5.4.0-1073.76
ubuntu/linux-bluefield<5.4.0-1032.35
5.4.0-1032.35
ubuntu/linux-gcp<5.4.0-1068.72
5.4.0-1068.72
ubuntu/linux-gkeop<5.4.0-1037.38
5.4.0-1037.38
ubuntu/linux-ibm<5.4.0-1018.20
5.4.0-1018.20
ubuntu/linux-kvm<5.4.0-1059.62
5.4.0-1059.62
ubuntu/linux-oracle<5.4.0-1067.72
5.4.0-1067.72
ubuntu/linux-raspi<5.4.0-1056.63
5.4.0-1056.63
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-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<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-fips<5.4.0-1046.52
5.4.0-1046.52
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-nvidia-6.2*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.15.0-1131.144~14.04.1
  2. Upgrade

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

    Fixed in 4.4.0-1145.151
  3. Upgrade

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

    Fixed in 4.4.0-270.304~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-270.304
  5. Upgrade

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

    Fixed in 4.4.0-1183.198
  6. Upgrade

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

    Fixed in 4.15.0-1120.128~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-1131.144~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1116.130~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-169.177~16.04.1
  10. Upgrade

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

    Fixed in 4.4.0-1146.157
  11. Upgrade

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

    Fixed in 4.15.0-1087.95~16.04.1
  12. Upgrade

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

    Fixed in 4.4.0-1115.122
  13. Upgrade

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

    Fixed in 4.15.0-169.177
  14. Upgrade

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

    Fixed in 4.15.0-1121.129
  15. Upgrade

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

    Fixed in 5.4.0-1069.73~18.04.1
  16. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1131.144
  17. Upgrade

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

    Fixed in 5.4.0-1073.76~18.04.1
  18. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1116.130
  19. Upgrade

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

    Fixed in 5.4.0-1068.72~18.04.1
  20. Upgrade

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

    Fixed in 5.4.0-105.119~18.04.1
  21. Upgrade

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

    Fixed in 5.4.0-1018.20~18.04.1
  22. Upgrade

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

    Fixed in 4.15.0-1107.109
  23. Upgrade

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

    Fixed in 4.15.0-1087.95
  24. Upgrade

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

    Fixed in 5.4.0-1067.72~18.04.1
  25. Upgrade

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

    Fixed in 5.4.0-1056.63~18.04.1
  26. Upgrade

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

    Fixed in 4.15.0-2061.63
  27. Upgrade

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

    Fixed in 4.15.0-2043.47
  28. Upgrade

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

    Fixed in 4.15.0-1078.87
  29. Upgrade

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

    Fixed in 4.15.0-2026.28
  30. Upgrade

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

    Fixed in 5.4.0-105.119
  31. Upgrade

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

    Fixed in 5.4.0-1069.73
  32. Upgrade

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

    Fixed in 5.4.0-1073.76
  33. Upgrade

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

    Fixed in 5.4.0-1032.35
  34. Upgrade

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

    Fixed in 5.4.0-1068.72
  35. Upgrade

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

    Fixed in 5.4.0-1037.38
  36. Upgrade

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

    Fixed in 5.4.0-1018.20
  37. Upgrade

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

    Fixed in 5.4.0-1059.62
  38. Upgrade

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

    Fixed in 5.4.0-1067.72
  39. Upgrade

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

    Fixed in 5.4.0-1056.63
  40. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  41. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  42. Upgrade

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

    Fixed in 5.4.0-1046.52
  43. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  44. Compensating control

    In the Linux kernel scsi_debug driver, update resp_mode_select() to sanity-check the block descriptor length before using it, preventing the use-after-free.

Event History

Jun 19, 2024
CVE Published
via MITRE·02:53 PM
Data Sourced
via MITRE·02:53 PM
DescriptionSeverity
Data Sourced
via OSV·03:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-47576?

CVE-2021-47576 is categorized as a medium severity vulnerability due to its potential for causing system instability through a use-after-free condition.

2

How do I fix CVE-2021-47576?

To fix CVE-2021-47576, update to a version of the Linux kernel that is above 4.9.294 or in the specified non-vulnerable ranges.

3

Which versions of Linux Kernel are vulnerable to CVE-2021-47576?

Versions of the Linux kernel from 4.10 to 4.14.259, 4.15 to 4.19.222, 4.20 to 5.4.168, 5.5 to 5.10.88, and 5.11 to 5.15.11 are vulnerable to CVE-2021-47576.

4

What type of vulnerability is CVE-2021-47576?

CVE-2021-47576 is a use-after-free vulnerability that occurs in the `resp_mode_select()` function of the Linux kernel SCSI subsystem.

5

Which component of the operating system is affected by CVE-2021-47576?

CVE-2021-47576 affects the SCSI subsystem of the Linux kernel.

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