gfs2: Fix NULL pointer dereference in gfs2_log_flush
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 9 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix NULL pointer dereference in gfs2_log_flush In gfs2_jindex_free(), set sdp->sd_jdesc to NULL under the log flush lock to provide exclusion against gfs2_log_flush(). In gfs2_log_flush(), check if sdp->sd_jdesc is non-NULL before dereferencing it. Otherwise, we could run into a NULL pointer dereference when outstanding glock work races with an unmount (glock_work_func -> run_queue -> do_xmote -> inode_go_sync -> gfs2_log_flush).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.200, 6.1.162, 6.6.37, 6.9.8, 6.10
Red Hat 3 advisories
- RHSA-2024:8856 Released 2024-11-05 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.27.1.el8_10, kernel-4.18.0-553.27.1.el8_10, kernel-abi-stablelists-4.18.0-553.27.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.27.1.el8_10
- RHSA-2024:8870 Released 2024-11-05 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-4.18.0-553.27.1.rt7.368.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-4.18.0-553.27.1.rt7.368.el8_10 +7
- RHSA-2024:8162 Released 2024-10-16 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.40.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.40.1.el9_4, kernel-64k-devel-5.14.0-427.40.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.40.1.el9_4, kernel-5.14.0-427.40.1.el9_4, kernel-64k-5.14.0-427.40.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.40.1.el9_4, libperf-5.14.0-427.40.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.40.1.el9_4, kernel-rt-core-5.14.0-427.40.1.el9_4, kernel-rt-debug-5.14.0-427.40.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.40.1.el9_4, kernel-rt-core-5.14.0-427.40.1.el9_4, kernel-rt-debug-5.14.0-427.40.1.el9_4 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:8162 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:8856 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:8162 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:8856 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:8162 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:8870 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:8162 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:8870 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:8162 |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-42079
- 2026-10-03 Alias added: GHSA-7wph-5wjx-7rgv
- 2026-10-29 Affected versions changed · Red Hat
References
Patch 5
- https://git.kernel.org/stable/c/c3c5cfa3170c0940bc66a142859caac07d19b9d6
- https://git.kernel.org/stable/c/5f6a84cfb33b34610623857bd93919dcb661e29b
- https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce
- https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef
- https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2024-42079 · CVE Program
- CVE-2024-42079 · NVD
- FIRST EPSS
- GHSA-7wph-5wjx-7rgv · GitHub Advisory Database · CC BY 4.0
- CVE-2024-42079 · Red Hat security data · CC BY 4.0
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