# CVE-2026-123269: libyal libvmdk Descriptor File libvmdk_descriptor_file.c libvmdk_descriptor_file_read_header out-of-bounds

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

A vulnerability was detected in libyal libvmdk. Affected by this vulnerability is the function libvmdk_descriptor_file_read_header of the file libvmdk/libvmdk_descriptor_file.c of the component Descriptor File Parser. The manipulation results in out-of-bounds read. The attack must be initiated from a local position. The exploit is now public and may be used. The patch is identified as 175d3fc0a0b961f362f16e7560a6169d7213e16b. It is best practice to apply a patch to resolve this issue.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/libyal/libvmdk/commit/175d3fc0a0b961f362f16e7560a6169d7213e16b

## Affected products and versions

- libyal / libvmdk: Version not specified (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 3.3 (low); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 3.3 (low); CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 1.7 (low); AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-125, CWE-119

## Exploit evidence

- exploit: https://github.com/user-attachments/files/33394231/03_integer_underflow_poc.zip (CNA: VulDB)

## References

- https://vuldb.com/vuln/431575 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/431575/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-123269 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1032842 (CNA: VulDB; third-party-advisory)

- https://github.com/libyal/libvmdk/issues/41 (CNA: VulDB; issue-tracking)

- https://github.com/user-attachments/files/33394231/03_integer_underflow_poc.zip (CNA: VulDB; exploit)

- https://github.com/libyal/libvmdk/commit/175d3fc0a0b961f362f16e7560a6169d7213e16b (CNA: VulDB; patch)

- https://github.com/libyal/libvmdk/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-123269; retrieved 2026-11-06; source updated 2026-11-06

Revision: f41d88da92b284459561cc3a16f023df457bba4958dc3c8ef2d115fb7826478a

Canonical: https://y2.dev/cve/CVE-2026-123269

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