NTB: ntb_transport: Reject oversized TX buffers

Answer in brief

CVE-2026-80987 records a Unknown severity vulnerability in NTB: ntb_transport: Reject oversized TX buffers. 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 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	>=fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 <a7f22105a7df8c7fd74d0af27ace6fa94fe03d87 \|\| >=fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 <6b6bbc6c878d64eacc60877df49fce7b1b6a08d0 \|\| >=fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 <75a604e9f1cfdebda421062fdf42225ca32154cd \|\| >=fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 <a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7	a7f22105a7df8c7fd74d0af27ace6fa94fe03d87, 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0, 75a604e9f1cfdebda421062fdf42225ca32154cd, a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7
Linux/Linuxgeneric	3.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to a7f22105a7df8c7fd74d0af27ace6fa94fe03d87 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_transport: Reject oversized TX buffers ntb_process_tx() handles an oversized buffer by calling tx_handler() with a NULL data pointer and returning success. ntb_netdev therefore neither frees the skb in its completion callback nor takes its enqueue error path, leaking it. Reject oversized buffers in ntb_transport_tx_enqueue() before acquiring a queue entry and return -EMSGSIZE. The caller retains ownership of the buffer, and the preceding netdev patch frees the skb when enqueue returns this permanent error.

Quoted source text, attributed separately from HOL analysis.