CVE-2021-4155

medium

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.

References

Advisories
More

https://www.openwall.com/lists/oss-security/2022/01/10/1

https://security-tracker.debian.org/tracker/CVE-2021-4155

https://bugzilla.redhat.com/show_bug.cgi?id=2034813

https://access.redhat.com/security/cve/CVE-2021-4155

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79

Details

Source: Mitre, NVD

Published: 2022-08-24

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N