CVE-2024-42079

gfs2: Fix NULL pointer dereference in gfs2_log_flush

Description

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).

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce patch
https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef patch
https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828 patch

Frequently Asked Questions

What is the severity of CVE-2024-42079?
CVE-2024-42079 has been scored as a medium severity vulnerability.
How to fix CVE-2024-42079?
To fix CVE-2024-42079, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-42079 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-42079 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-42079?
CVE-2024-42079 affects Linux Linux, Linux Linux.
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