CVE-2026-123269: libyal libvmdk

libyal libvmdk Descriptor File libvmdk_descriptor_file.c libvmdk_descriptor_file_read_header out-of-bounds

CVSS 4.8 Medium

Published by the CVE Program (CNA: VulDB) at 6 Nov 2026, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
libyal	libvmdk	affected n/a

Identifiers

CVE-2026-123269

CNA

VulDB

Weakness (CWE)

CWE-119 · CWE-125

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
4.8	Medium	4.0	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	CNA (VulDB)Used for this record
3.3	Low	3.1	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	CNA (VulDB)
3.3	Low	3.0	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	CNA (VulDB)
1.7	Low	2.0	AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C	CNA (VulDB)

CISA KEV Not listed.
EPSS No score.

Timeline

6 Nov 2026, 00:00 UTC Confirmed by the CVE List
6 Nov 2026, 00:35 UTC First seen by agentprime
6 Nov 2026, 01:17 UTC Confirmed by NVD

Sources

References from the CNA

vuldb.com/vuln/431575 vdb-entrytechnical-description
vuldb.com/vuln/431575/cti signaturepermissions-required
vuldb.com/cve/CVE-2026-123269 third-party-advisory
vuldb.com/submit/1032842 third-party-advisory
github.com/libyal/libvmdk/issues/41 issue-tracking
github.com/libyal/libvmdk/commit/175d3fc0a0b961f362f16e7560a6169d7213e16b patch
github.com/libyal/libvmdk/ product
github.com/user-attachments/files/33394231/03_integer_underflow_poc.zip exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.