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CVE-2021-4155

Date: August 24, 2022

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.

Severity Score

Related Resources (8)

https://www.openwall.com/lists/oss-security/2022/01/10/1
https://access.redhat.com/security/cve/CVE-2021-4155
https://bugzilla.redhat.com/show_bug.cgi?id=2034813
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79
https://nvd.nist.gov/vuln/detail/CVE-2021-4155
https://security-tracker.debian.org/tracker/CVE-2021-4155
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-4155
https://www.mend.io/vulnerability-database/CVE-2021-4155

Severity Score

Weakness Type (CWE)

Incorrect Calculation of Buffer Size

CWE-131

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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