Log in Start free

Vulnerability · Published Jul 12, 2024 · Assigned by Linux

CVE-2024-40951ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger() bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. Since ocfs2 hasn't set bh->b_assoc_map, it will trigger NULL pointer dereference when calling into ocfs2_abort_trigger(). Actually this was pointed out in history, see commit 74e364ad1b13. But I've made a mistake when reviewing commit 8887b94d9322 and then re-introduce this regression. Since we cannot revive bdev in buffer head, so fix this issue by initializing all types of ocfs2 triggers when fill super, and then get the specific ocfs2 trigger from ocfs2_caching_info when access journal. [joseph.qi@linux.alibaba.com: v2]

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.9.7-1DEBIAN-CVE-2024-40951
Debian:14linux6.9.7-1DEBIAN-CVE-2024-40951
Ubuntu:24.04:LTSlinux6.8.0-44.44UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-aws6.8.0-1015.16UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1015.16~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-azure6.8.0-1014.16UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-gcp6.8.0-1014.16UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-gke6.8.0-1010.13UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-45.45~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-ibm6.8.0-1012.12UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-44.44.1UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1013.14UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1013.14~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1013.14.1UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1012.12UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-oracle6.8.0-1012.12UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1012.12~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-raspi6.8.0-1011.12UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-40951
Ubuntu:24.04:LTSlinux-riscv6.8.0-44.44.1UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-40951
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-40951

Affected products (as reported)

VendorProductVersions
Linux Linux 8887b94d93224e0ef7e1bc6369640e313b8b12f4 – before 67bcecd780609f471260a8c83fb0ae15f27734ce8887b94d93224e0ef7e1bc6369640e313b8b12f4 – before eb63357ef229fae061ce7ce2839d558681c42f1a8887b94d93224e0ef7e1bc6369640e313b8b12f4 – before 685d03c3795378fca6a1b3d43581f7f1a3fc095f
Linux Linux 6.6

References