net: ethernet: cortina: Count dropped frames as NAPI work (CVE-2026-97981) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97981

net: ethernet: cortina: Count dropped frames as NAPI work

Answer in brief

CVE-2026-97981 records a Unknown severity vulnerability in net: ethernet: cortina: Count dropped frames as NAPI work. 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	>=4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 <58140f1cebb776d174dc6ff41c15401654a5b1ea \|\| >=4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 <cceb6cd7f0e5ed2944a9ca22443d7b9da82f60ab \|\| >=4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 <5754e0c0758805096ecfeaf4c1b146ad51ed246f \|\| >=4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 <b856c552f556bc0341c1dbe0bf88e630fd1dc4b7	58140f1cebb776d174dc6ff41c15401654a5b1ea, cceb6cd7f0e5ed2944a9ca22443d7b9da82f60ab, 5754e0c0758805096ecfeaf4c1b146ad51ed246f, b856c552f556bc0341c1dbe0bf88e630fd1dc4b7
Linux/Linuxgeneric	4.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 58140f1cebb776d174dc6ff41c15401654a5b1ea 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: net: ethernet: cortina: Count dropped frames as NAPI work The RX loop only consumes budget when it successfully delivers a frame. Error paths keep consuming descriptors without reducing the budget, so a stream of bad frames can process the entire receive ring in one poll. Move the budget accounting to a common end-of-frame path. This counts each completed frame as NAPI work whether it was delivered or dropped, matching the behavior of the vendor driver.

Quoted source text, attributed separately from HOL analysis.