ipvs: do not keep dest_dst if dev is going down

Answer in brief

CVE-2026-45917 records a Medium severity (CVSS 5.5) vulnerability in ipvs: do not keep dest_dst if dev is going down. 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 May 27, 2026Updated Jun 24, 2026Source checked Sep 19, 2026First seen by HOL Jun 24, 2026Material review Jun 24, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.5. 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	>=7a4f0761fce32ff4918a7c23b08db564ad33092d <64af43033503458c46023e56d6ae7bb0f824b55f \|\| >=7a4f0761fce32ff4918a7c23b08db564ad33092d <bae53b3baf2ff2f45f9205c438818fc055601a54 \|\| >=7a4f0761fce32ff4918a7c23b08db564ad33092d <024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e \|\| >=7a4f0761fce32ff4918a7c23b08db564ad33092d <8fde939b0206afc1d5846217a01a16b9bc8c7896	64af43033503458c46023e56d6ae7bb0f824b55f, bae53b3baf2ff2f45f9205c438818fc055601a54, 024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e, 8fde939b0206afc1d5846217a01a16b9bc8c7896
Linux/Linuxgeneric	2.6.39	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 64af43033503458c46023e56d6ae7bb0f824b55f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 24, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ipvs: do not keep dest_dst if dev is going down There is race between the netdev notifier ip_vs_dst_event() and the code that caches dst with dev that is going down. As the FIB can be notified for the closed device after our handler finishes, it is possible valid route to be returned and cached resuling in a leaked dev reference until the dest is not removed. To prevent new dest_dst to be attached to dest just after the handler dropped the old one, add a netif_running() check to make sure the notifier handler is not currently running for device that is closing.

Quoted source text, attributed separately from HOL analysis.