UBUNTU-CVE-2024-56664: Use After Free

Q: Who is realistically positioned to exploit this issue?

The supplied vector rates the attack as local and requires high privileges. It also has high attack complexity and requires a specific race condition.

Q: What conditions are needed to trigger the race?

A sockmap element must be replaced with a different socket while the previously stored socket is being closed and its links are being removed. The erroneous deletion can then unreference the replacement socket, leaving the map entry dangling.

Q: Which Ubuntu kernel package variants are identified as affected?

The listed variants are ubuntu/linux, ubuntu/linux-fips, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, ubuntu/linux-gcp-fips, and ubuntu/linux-realtime.

Published Dec 27, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix race between element replace and close() Element replace (with a socket different from the one stored) may race with socket's close() link popping & unlinking. sockmapdelete() unconditionally unrefs the (wrong) element: // set map[0] = s0 mapupdateelem(map, 0, s0) // drop fd of s0 close(s0) sockmapclose() locksock(sk) (s0!) sockmapremovelinks(sk) link = skpsocklinkpop() sockmapunlink(sk, link) sockmapdeletefromlink // replace map[0] with s1 mapupdateelem(map, 0, s1) sockmapupdateelem (s1!) locksock(sk) sockmapupdatecommon psock = skpsock(sk) spinlock(&stab->lock) osk = stab->sks[idx] sockmapaddlink(..., &stab->sks[idx]) sockmapunref(osk, &stab->sks[idx]) psock = skpsock(osk) skpsockput(sk, psock) if (refcountdecandtest(&psock)) skpsockdrop(sk, psock) spinunlock(&stab->lock) unlocksock(sk) sockmapdelete spinlock(&stab->lock) sk = psk // s1 replaced s0; sk == s1 if (!sktest || sktest == sk) // sktest (s0) != sk (s1); no branch sk = xchg(psk, NULL) if (sk) sockmapunref(sk, psk) // unref s1; sks[idx] will dangle psock = skpsock(sk) skpsockput(sk, psock) if (refcountdecandtest()) skpsockdrop(sk, psock) spinunlock(&stab->lock) releasesock(sk) Then close(map) enqueues bpfmapfreedeferred, which finally calls sockmapfree(). This results in some refcountt warnings along with a KASAN splat [1]. Fix sockmapdelete(), do not allow sockmapunref() on elements that may have been replaced. [1]: BUG: KASAN: slab-use-after-free in sockmapfree+0x10e/0x330 Write of size 4 at addr ffff88811f5b9100 by task kworker/u64:12/1063 CPU: 14 UID: 0 PID: 1063 Comm: kworker/u64:12 Not tainted 6.12.0+ #125 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Workqueue: eventsunbound bpfmapfreedeferred Call Trace: <TASK> dumpstacklvl+0x68/0x90 printreport+0x174/0x4f6 kasanreport+0xb9/0x190 kasancheckrange+0x10f/0x1e0 sockmapfree+0x10e/0x330 bpfmapfreedeferred+0x173/0x320 processonework+0x846/0x1420 workerthread+0x5b3/0xf80 kthread+0x29e/0x360 retfromfork+0x2d/0x70 retfromforkasm+0x1a/0x30 </TASK> Allocated by task 1202: kasansavestack+0x1e/0x40 kasansavetrack+0x10/0x30 kasanslaballoc+0x85/0x90 kmemcacheallocnoprof+0x131/0x450 skprotalloc+0x5b/0x220 skalloc+0x2c/0x870 unixcreate1+0x88/0x8a0 unixcreate+0xc5/0x180 sockcreate+0x241/0x650 syssocketpair+0x1ce/0x420 x64syssocketpair+0x92/0x100 dosyscall64+0x93/0x180 entrySYSCALL64afterhwframe+0x76/0x7e Freed by task 46: kasansavestack+0x1e/0x40 kasansavetrack+0x10/0x30 kasansavefreeinfo+0x37/0x60 kasanslabfree+0x4b/0x70 kmemcachefree+0x1a1/0x590 skdestruct+0x388/0x5a0 skpsockdestroy+0x73e/0xa50 processonework+0x846/0x1420 workerthread+0x5b3/0xf80 kthread+0x29e/0x360 retfromfork+0x2d/0x70 retfromforkasm+0x1a/0x30 The bu ---truncated---

Affected Software

178 affected componentsFixes available

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1152.162~18.04.1

5.4.0-1152.162~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1156.163~18.04.1

5.4.0-1156.163~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1155.164~18.04.1

5.4.0-1155.164~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-223.243~18.04.1

5.4.0-223.243~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1098.103~18.04.1

5.4.0-1098.103~18.04.1

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1150.160~18.04.1

5.4.0-1150.160~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1135.148~18.04.1

5.4.0-1135.148~18.04.1

ubuntu/linux<5.4.0-223.243

5.4.0-223.243

ubuntu/linux-aws<5.4.0-1152.162

5.4.0-1152.162

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1086.93~20.04.1

5.15.0-1086.93~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1156.163

5.4.0-1156.163

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1091.100~20.04.1

5.15.0-1091.100~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield<5.4.0-1111.118

5.4.0-1111.118

ubuntu/linux-gcp<5.4.0-1155.164

5.4.0-1155.164

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1085.94~20.04.1

5.15.0-1085.94~20.04.1

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-5.15<5.15.0-142.152~20.04.1

5.15.0-142.152~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1098.103

5.4.0-1098.103

ubuntu/linux-ibm-5.15<5.15.0-1078.81~20.04.1

5.15.0-1078.81~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1083.89~20.04.1

5.15.0-1083.89~20.04.1

ubuntu/linux-iot<5.4.0-1056.59

5.4.0-1056.59

ubuntu/linux-kvm<5.4.0-1139.148

5.4.0-1139.148

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-142.152~20.04.1

5.15.0-142.152~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1039.39~20.04.1

5.15.0-1039.39~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1150.160

5.4.0-1150.160

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1083.89~20.04.1

5.15.0-1083.89~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1135.148

5.4.0-1135.148

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1081.85~20.04.1

5.15.0-1081.85~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1070.74

5.4.0-1070.74

ubuntu/linux-aws-fips<5.4.0-1152.162+fips1

5.4.0-1152.162+fips1

ubuntu/linux-azure-fips<5.4.0-1157.164+fips1

5.4.0-1157.164+fips1

ubuntu/linux-fips<5.4.0-1126.136

5.4.0-1126.136

ubuntu/linux-gcp-fips<5.4.0-1155.164+fips1

5.4.0-1155.164+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-142.152

5.15.0-142.152

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1086.93

5.15.0-1086.93

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1029.31~22.04.1

6.8.0-1029.31~22.04.1

ubuntu/linux-azure<5.15.0-1091.100

5.15.0-1091.100

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1029.34~22.04.1

6.8.0-1029.34~22.04.1

ubuntu/linux-azure-fde<5.15.0-1091.100.1

5.15.0-1091.100.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1085.94

5.15.0-1085.94

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1030.32~22.04.1

6.8.0-1030.32~22.04.1

ubuntu/linux-gke<5.15.0-1083.89

5.15.0-1083.89

ubuntu/linux-gkeop<5.15.0-1068.76

5.15.0-1068.76

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-60.63~22.04.1

6.8.0-60.63~22.04.1

ubuntu/linux-ibm<5.15.0-1078.81

5.15.0-1078.81

ubuntu/linux-ibm-6.8<6.8.0-1026.26~22.04.1

6.8.0-1026.26~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1081.87

5.15.0-1081.87

ubuntu/linux-kvm<5.15.0-1082.87

5.15.0-1082.87

ubuntu/linux-lowlatency<5.15.0-142.152

5.15.0-142.152

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-60.63.1~22.04.1

6.8.0-60.63.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1080.81

5.15.0-1080.81

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1028.31~22.04.1

6.8.0-1028.31~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1039.39

5.15.0-1039.39

ubuntu/linux-nvidia-tegra-igx<5.15.0-1028.28

5.15.0-1028.28

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1083.89

5.15.0-1083.89

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1026.27~22.04.1

6.8.0-1026.27~22.04.1

ubuntu/linux-raspi<5.15.0-1080.83

5.15.0-1080.83

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-62.65~22.04.1

6.8.0-62.65~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1050.54

5.15.0-1050.54

ubuntu/linux-bluefield<5.15.0-1069.71

5.15.0-1069.71

ubuntu/linux-intel-iot-realtime<5.15.0-1079.81

5.15.0-1079.81

ubuntu/linux-realtime<5.15.0-1086.95

5.15.0-1086.95

ubuntu/linux-realtime-6.8<6.8.1-1022.23~22.04.1

6.8.1-1022.23~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1086.93+fips1

5.15.0-1086.93+fips1

ubuntu/linux-azure-fips<5.15.0-1091.100+fips1

5.15.0-1091.100+fips1

ubuntu/linux-fips<5.15.0-142.152+fips1

5.15.0-142.152+fips1

ubuntu/linux-gcp-fips<5.15.0-1085.94+fips1

5.15.0-1085.94+fips1

ubuntu/linux<6.8.0-60.63

6.8.0-60.63

ubuntu/linux-aws<6.8.0-1029.31

6.8.0-1029.31

ubuntu/linux-azure<6.8.0-1029.34

6.8.0-1029.34

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<6.8.0-1016.17

6.8.0-1016.17

ubuntu/linux-gcp<6.8.0-1030.32

6.8.0-1030.32

ubuntu/linux-gcp-6.11<6.11.0-1011.11~24.04.1

6.11.0-1011.11~24.04.1

ubuntu/linux-gke<6.8.0-1025.29

6.8.0-1025.29

ubuntu/linux-gkeop<6.8.0-1012.14

6.8.0-1012.14

ubuntu/linux-hwe-6.11<6.11.0-21.21~24.04.1

6.11.0-21.21~24.04.1

ubuntu/linux-ibm<6.8.0-1026.26

6.8.0-1026.26

ubuntu/linux-lowlatency<6.8.0-60.63.1

6.8.0-60.63.1

ubuntu/linux-nvidia<6.8.0-1028.31

6.8.0-1028.31

ubuntu/linux-nvidia-6.11<6.11.0-1007.7

6.11.0-1007.7

ubuntu/linux-nvidia-lowlatency<6.8.0-1028.31.1

6.8.0-1028.31.1

ubuntu/linux-nvidia-tegra<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-oem-6.11<6.11.0-1017.17

6.11.0-1017.17

ubuntu/linux-oem-6.8<6.8.0-1028.28

6.8.0-1028.28

ubuntu/linux-oracle<6.8.0-1026.27

6.8.0-1026.27

ubuntu/linux-raspi<6.8.0-1028.32

6.8.0-1028.32

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv<6.8.0-60.63.1

6.8.0-60.63.1

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2023.24

6.8.0-2023.24

ubuntu/linux-realtime<6.8.1-1022.23

6.8.1-1022.23

ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1152.162~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1156.163~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1155.164~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-223.243~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1098.103~18.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1150.160~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.148~18.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-223.243
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1152.162
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1086.93~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1156.163
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1091.100~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1111.118
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1155.164
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1085.94~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-142.152~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1098.103
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.81~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1083.89~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.59
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1139.148
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-142.152~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1039.39~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1150.160
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1083.89~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.148
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1081.85~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1070.74
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1152.162+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1157.164+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1126.136
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1155.164+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-142.152
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1086.93
Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1029.31~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1091.100
Upgrade
Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1029.34~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1091.100.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1085.94
Upgrade
Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1030.32~22.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1083.89
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1068.76
Upgrade
Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-60.63~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.81
Upgrade
Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.26~22.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1081.87
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1082.87
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-142.152
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-60.63.1~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1080.81
Upgrade
Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1028.31~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1039.39
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1028.28
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1083.89
Upgrade
Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.27~22.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1080.83
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Fixed in 6.8.0-62.65~22.04.1
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Fixed in 5.15.0-1050.54
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Fixed in 5.15.0-1069.71
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Fixed in 5.15.0-1079.81
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Fixed in 5.15.0-1086.95
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Fixed in 6.8.1-1022.23~22.04.1
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Fixed in 5.15.0-1086.93+fips1
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Fixed in 5.15.0-1091.100+fips1
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Fixed in 5.15.0-142.152+fips1
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Fixed in 5.15.0-1085.94+fips1
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Fixed in 6.8.0-60.63
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Fixed in 6.8.0-1029.31
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Fixed in 6.8.0-1029.34
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Fixed in 6.11.0-1012.12~24.04.1
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Fixed in 6.8.0-1016.17
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Fixed in 6.8.0-1030.32
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Fixed in 6.11.0-1011.11~24.04.1
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Fixed in 6.8.0-1025.29
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Fixed in 6.8.0-1012.14
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Fixed in 6.11.0-21.21~24.04.1
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Fixed in 6.8.0-1026.26
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Fixed in 6.8.0-60.63.1
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Fixed in 6.8.0-1028.31
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Fixed in 6.11.0-1007.7
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Fixed in 6.8.0-1028.31.1
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Fixed in 6.8.0-1008.8
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Fixed in 6.11.0-1017.17
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Fixed in 6.8.0-1028.28
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Fixed in 6.8.0-1026.27
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Fixed in 6.8.0-1028.32
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Fixed in 6.8.0-60.63.1
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-2023.24
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Fixed in 6.8.1-1022.23
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Fixed in 6.8.0-78.78+fips1
Compensating control
Fix __sock_map_delete() so that sock_map_unref() is not called on elements that may have been replaced during the race between element replacement and socket close().

Event History

Dec 27, 2024

CVE Published

via OSV·03:15 PM

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Who is realistically positioned to exploit this issue?

The supplied vector rates the attack as local and requires high privileges. It also has high attack complexity and requires a specific race condition.

What conditions are needed to trigger the race?

A sockmap element must be replaced with a different socket while the previously stored socket is being closed and its links are being removed. The erroneous deletion can then unreference the replacement socket, leaving the map entry dangling.

Which Ubuntu kernel package variants are identified as affected?

The listed variants are ubuntu/linux, ubuntu/linux-fips, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, ubuntu/linux-gcp-fips, and ubuntu/linux-realtime.

UBUNTU-CVE-2024-56664: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

Who is realistically positioned to exploit this issue?

What conditions are needed to trigger the race?

Which Ubuntu kernel package variants are identified as affected?

Company

Resources

Contact

Frequently Asked Questions

Who is realistically positioned to exploit this issue?

What conditions are needed to trigger the race?

Which Ubuntu kernel package variants are identified as affected?