ovpn: fix NULL dereference when killing missing key (CVE-2026-80520) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80520

ovpn: fix NULL dereference when killing missing key

Answer in brief

CVE-2026-80520 records a Unknown severity vulnerability in ovpn: fix NULL dereference when killing missing key. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=89d3c0e4612afa1c6429ed68d298e35592fbe208 <a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3 \|\| >=89d3c0e4612afa1c6429ed68d298e35592fbe208 <acf32a5dff082044cf0fd9492f3c10b7357c15ee \|\| >=89d3c0e4612afa1c6429ed68d298e35592fbe208 <41d44ac7a61e2f74453af40d4fe1b82af9ea0ada	a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3, acf32a5dff082044cf0fd9492f3c10b7357c15ee, 41d44ac7a61e2f74453af40d4fe1b82af9ea0ada
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ovpn: fix NULL dereference when killing missing key ovpn_crypto_kill_key assumes both crypto slots are populated and dereferences each slot before checking it. That is not guaranteed: a peer can have only one installed key, and the kill path may be asked to remove a key that is not present. Read each slot once while holding the crypto state lock, check for NULL before looking at key_id, and only replace the slot that actually matches.

Quoted source text, attributed separately from HOL analysis.