CVE-2021-44879

Public Exploit

Description

In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL pointer dereference.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3 mailing list vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=215231 issue tracking exploit vendor advisory
https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao%40kernel.org/T/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f mailing list patch vendor advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html mailing list
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-44879?
CVE-2021-44879 has been scored as a medium severity vulnerability.
How to fix CVE-2021-44879?
To fix CVE-2021-44879, 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-2021-44879 being actively exploited in the wild?
It is possible that CVE-2021-44879 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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