CVE-2023-4949

Name: CVE-2023-4949
Creator: NVD / NIST
Published: 2023-11-10T17:15:07.57+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2023-4949 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. . EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.24%

15.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Grub	<= 0.97
Xen	Xen	All versions

References

https://xenbits.xenproject.org/xsa/advisory-443.htmlPatch, Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-443.htmlPatch, Third Party Advisory

Timeline

Published: Nov 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4949?

How severe is CVE-2023-4949?

CVE-2023-4949 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4949?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4949?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST