CVE-2021-4155

Published: Aug 24, 2022Modified: Jun 17, 2026

5.5

Vector

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

Exploitability: 1.8 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	Before 5.16

Related CWEs

CWE-131

Incorrect Calculation of Buffer Size

The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.

References (10)

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

Source: secalert@redhat.com

MitigationThird Party Advisory

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

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

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

Source: secalert@redhat.com

Mailing ListPatchVendor Advisory

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

Source: secalert@redhat.com

Third Party Advisory

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

Source: secalert@redhat.com

Mailing ListPatchThird Party Advisory

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