CVE-2021-4155

MEDIUM

XFS - Info Disclosure

Title source: llm

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 (5)

[Mitigation, Third Party Advisory] https://access.redhat.com/security/cve/CVE-2021-4155

[Issue Tracking, Third Party Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=2034813

[Mailing List, Patch, Vendor Advisory] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79

[Third Party Advisory] https://security-tracker.debian.org/tracker/CVE-2021-4155

[Mailing List, Patch, Third Party Advisory] https://www.openwall.com/lists/oss-security/2022/01/10/1

Scores

CVSS v3 5.5

EPSS 0.0002

EPSS Percentile 4.6%

Attack Vector LOCAL

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

Classification

CWE

CWE-131

Status published

Affected Products (1)

linux/linux_kernel < 5.16

Timeline

Published Aug 24, 2022

Tracked Since Feb 18, 2026