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TI-2023-04558 Aliases CVE-2023-4949

Memory Corruption Vulnerability in Grub-Legacy's XFS Implementation

Priority LOW 35CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00241 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gnu:grub:*:*:*:*:*:*:*:*up to 0.97VulnerableGNU
cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*not specified by NVDVulnerableXen
  • cpe:2.3:a:gnu:grub:*:*:*:*:*:*:*:* Versions up to 0.97 Vulnerable ·GNU
  • cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Xen

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4949

References

Patch 1

  • TI-2004-00367 Unknown vulnerability in libtasn1 0.1.x before 0.1.2, and 0.2.x before 0.2.7, related to the DER parsing functions. CVSS 2.0HIGH 10.0
  • TI-2006-00624 Tiny ASN.1 Library (libtasn1) before 0.2.18, as used by (1) GnuTLS 1.2.x before 1.2.10… CVSS 2.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences