CVE-2023-52939

mm: memcg: fix NULL pointer in mem_cgroup_track_foreign_dirty_slowpath()

Description

In the Linux kernel, the following vulnerability has been resolved: mm: memcg: fix NULL pointer in mem_cgroup_track_foreign_dirty_slowpath() As commit 18365225f044 ("hwpoison, memcg: forcibly uncharge LRU pages"), hwpoison will forcibly uncharg a LRU hwpoisoned page, the folio_memcg could be NULl, then, mem_cgroup_track_foreign_dirty_slowpath() could occurs a NULL pointer dereference, let's do not record the foreign writebacks for folio memcg is null in mem_cgroup_track_foreign_dirty() to fix it.

References

Link	Tags
https://git.kernel.org/stable/c/b79ba5953f6fdc5559389ad415620bffc24f024b	patch
https://git.kernel.org/stable/c/ac86f547ca1002aec2ef66b9e64d03f45bbbfbb9	patch

Frequently Asked Questions

What is the severity of CVE-2023-52939?: CVE-2023-52939 has been scored as a medium severity vulnerability.
How to fix CVE-2023-52939?: To fix CVE-2023-52939, 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-2023-52939 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-52939 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-2023-52939?: CVE-2023-52939 affects Linux Linux, Linux Linux.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.

Description

Category

CWE-476 – NULL Pointer Dereference

References

Frequently Asked Questions