CVE-2021-4155

Description

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory kernel.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://www.openwall.com/lists/oss-security/2022/01/10/1 mailing list third party advisory patch
https://bugzilla.redhat.com/show_bug.cgi?id=2034813 issue tracking third party advisory
https://access.redhat.com/security/cve/CVE-2021-4155 third party advisory mitigation
https://security-tracker.debian.org/tracker/CVE-2021-4155 third party advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79 mailing list patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-4155?
CVE-2021-4155 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4155?
To fix CVE-2021-4155, 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-2021-4155 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-4155 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-2021-4155?
CVE-2021-4155 affects n/a kernel.
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