mptcp: fix bad accounting in __mptcp_subflow_push_pending() (CVE-2026-97522) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97522

mptcp: fix bad accounting in __mptcp_subflow_push_pending()

Answer in brief

CVE-2026-97522 records a Unknown severity vulnerability in mptcp: fix bad accounting in __mptcp_subflow_push_pending(). 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 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	>=0fa1b3783a17d75a4aa1651a18ede041ffca5750 <9781fa35d9f7a87a83115acd3a88bc9ce35b5407 \|\| >=0fa1b3783a17d75a4aa1651a18ede041ffca5750 <a0a64525f3414268ed4b1945a1dc690aa974dd4f \|\| >=0fa1b3783a17d75a4aa1651a18ede041ffca5750 <dc054821e639a2e14f1419436612db70b6af45fc \|\| >=0fa1b3783a17d75a4aa1651a18ede041ffca5750 <f3ef03357396d4b147d8e76c75fb612c2f264ffc	9781fa35d9f7a87a83115acd3a88bc9ce35b5407, a0a64525f3414268ed4b1945a1dc690aa974dd4f, dc054821e639a2e14f1419436612db70b6af45fc, f3ef03357396d4b147d8e76c75fb612c2f264ffc
Linux/Linuxgeneric	6.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9781fa35d9f7a87a83115acd3a88bc9ce35b5407 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix bad accounting in __mptcp_subflow_push_pending() If __subflow_push_pending() errors out we should avoid updating the copied byte counters, to avoid mismatch push call later on.

Quoted source text, attributed separately from HOL analysis.