ovpn: ensure socket is owned by ovpn before deref sk_user_data (CVE-2026-80735) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80735

ovpn: ensure socket is owned by ovpn before deref sk_user_data

Answer in brief

CVE-2026-80735 records a Unknown severity vulnerability in ovpn: ensure socket is owned by ovpn before deref sk_user_data. 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 Sep 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 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	>=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <61fb3cca40ff938671474f4a16adb908c19032d7 \|\| >=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <43a31142e1d22b3cf5490bd94a94db7196901734 \|\| >=f6226ae7a0cd47aaa9175aca6a1e19600f884cbf <59aed1eb60d70678a53acccb0cb337a26ce6680e	61fb3cca40ff938671474f4a16adb908c19032d7, 43a31142e1d22b3cf5490bd94a94db7196901734, 59aed1eb60d70678a53acccb0cb337a26ce6680e
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 61fb3cca40ff938671474f4a16adb908c19032d7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ovpn: ensure socket is owned by ovpn before deref sk_user_data Some subsystems, like BPF SOCKMAP, set sk_user_data without actually setting the encap_type. For this reason, we must make sure that the type is the one ovpn expects before dereferencing sk_user_data. Failing to do so may lead to out-of-bounds reads.

Quoted source text, attributed separately from HOL analysis.