CVE-2024-42079

low-risk
Published 2024-07-29

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).

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (8)

Patch https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce
Patch https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828
Patch https://git.kernel.org/stable/c/5f6a84cfb33b34610623857bd93919dcb661e29b
Patch https://git.kernel.org/stable/c/c3c5cfa3170c0940bc66a142859caac07d19b9d6
Patch https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef
Patch https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce
Patch https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828
Patch https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal