TI-2026-85715 Aliases CVE-2026-123269 GHSA-327v-6wgx-g787

Out-of-bounds read in libyal libvmdk descriptor file parser

MEDIUM 55CWE-119Published 2026-11-06 · Updated 2026-11-06

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

libyal libvmdk contains an out-of-bounds read in the function libvmdk_descriptor_file_read_header within its descriptor file parser. The flaw is a read past the end of a buffer, classified as CWE-125. A local attacker with low privileges can trigger it without user interaction, which can affect availability. A public exploit is referenced.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00113 1st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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

Vendor	Product	Affected versions	Fixed in	Status	Source
libyal	libvmdk	all versions	—	No fix listed	CNA

libvmdk Vendorlibyal Affected all versions Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:libyal:libvmdk::::::::	—	—	libyal

cpe:2.3:a:libyal:libvmdk:*:*:*:*:*:*:*:* Versions — — ·libyal

Remediation

The sources list no fixed version for libvmdk. The description identifies commit 175d3fc as the patch for this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

2026-11-06 Threatist record created from CVE-2026-123269
2026-11-06 Alias added: GHSA-327v-6wgx-g787
2026-11-06 CISA SSVC decision points changed
2026-11-06 Priority changed: LOW → MEDIUM

References

Exploit 1

https://github.com/user-attachments/files/33394231/03_integer_underflow_poc.zip

Patch 1

https://github.com/libyal/libvmdk/commit/175d3fc0a0b961f362f16e7560a6169d7213e16b

Other 2

TI-2026-80946 Heap out-of-bounds read in libphdi extent data file path CVSS 4.0MEDIUM 6.9
TI-2026-80944 Heap out-of-bounds read in libpff table record parsing CVSS 4.0MEDIUM 6.9
TI-2026-74943 Heap out-of-bounds read in libewf L01 extended attribute parsing CVSS 4.0MEDIUM 6.9
TI-2026-74931 Heap out-of-bounds read in libyal libesedb multi-value handling CVSS 4.0MEDIUM 6.9
TI-2026-74924 Heap out-of-bounds read in libregf value data parsing CVSS 4.0MEDIUM 6.9
TI-2026-74919 libfwsi Heap Out-of-Bounds Read via libfwsi_mtp_volume_values_read_data CVSS 4.0MEDIUM 6.9

See all 14 →

Sources

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