Medium [CVE-2023-3212] Linux kernel (gfs2 file system): NULL pointer dereference issue was found in the gfs2 file system in the Linux kernel
This medium-severity Red Hat Linux advisory covers CVE-2023-3212 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 7.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
A NULL pointer dereference issue was found in the gfs2 file system in the Linux kernel. It occurs on corrupt gfs2 file systems when the evict code tries to reference the journal descriptor structure after it has been freed and set to NULL.
A privileged local user could use this flaw to cause a kernel panic. Because exploitation of this flaw requires that an attacker is able to mount volumes they have prepared themselves or to corrupt existing system volumes, Red Hat assesses the impact of this vulnerability as Low.
Red Hat severity: Low — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-476.
Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 7.
Red Hat fixing advisory: RHSA-2023:6901, RHSA-2023:7077, RHSA-2023:6583.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
- kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9
- kernel-0:4.18.0-513.5.1.el8_9
- kernel-0:5.14.0-362.8.1.el9_3
- RHSA-2023:6901
- RHSA-2023:7077
- RHSA-2023:6583
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
Mitigation
Upgrade to a fixed release: kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9, kernel-0:4.18.0-513.5.1.el8_9, kernel-0:5.14.0-362.8.1.el9_3, RHSA-2023:6901, RHSA-2023:7077, RHSA-2023:6583. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
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