CVE-2023-4949: Memory Corruption Vulnerability in Grub-Legacy's XFS Implementation

Description

An attacker with local access to a system (either through a disk or external drive) can present a modified XFS partition to grub-legacy in such a way to exploit a memory corruption in grub’s XFS file system implementation.

Scores

CVSS scores of CVE-2023-4949, by who scored it
Scored by	CVSS	Score	Vector
GoogleCNA (assigner)	3.1	High8.1	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:H
NVDNVD · Modified	3.1	Medium6.7	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS (exploitation in 30 days): 0.24% · top 85% of all CVEs (7 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer (opens in a new tab)All about CWE-119 and its CVEs
CWE-190 Integer Overflow or Wraparound (opens in a new tab)All about CWE-190 and its CVEs
CWE-787 (opens in a new tab)All about CWE-787 and its CVEs

Affected products

Free Software Foundation · Grub-Legacy
- affected ≤ 0.97

References (1)

https://xenbits.xenproject.org/xsa/advisory-443.html (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2023-4949](https://trackcve.app/badge/CVE-2023-4949.svg)](https://trackcve.app/cve/CVE-2023-4949)

Record last updated 3 Sept 2024, 17:29 UTC.