enic: fix tx_hang_reset use-after-free on device removal (CVE-2026-74725) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-74725

enic: fix tx_hang_reset use-after-free on device removal

Answer in brief

CVE-2026-74725 records a Unknown severity vulnerability in enic: fix tx_hang_reset use-after-free on device removal. 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 Aug 22, 2026Updated Aug 22, 2026Source checked Aug 22, 2026First seen by HOL Aug 22, 2026Material review Aug 22, 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	>=937317c7c1097aa878a5000e3aab616eb5c590c0 <8619865f34fb3b130b567855382a5c4aadd522b9 \|\| >=937317c7c1097aa878a5000e3aab616eb5c590c0 <e506e704b74748ffd0e1c92a7453ca2a959f832b \|\| >=937317c7c1097aa878a5000e3aab616eb5c590c0 <4f3464fc6c1f26afc504fd525c574f2bc14c9d42 \|\| >=937317c7c1097aa878a5000e3aab616eb5c590c0 <ec680ea4ba1bca92a767fb7e7869758bfdd886e3	8619865f34fb3b130b567855382a5c4aadd522b9, e506e704b74748ffd0e1c92a7453ca2a959f832b, 4f3464fc6c1f26afc504fd525c574f2bc14c9d42, ec680ea4ba1bca92a767fb7e7869758bfdd886e3
Linux/Linuxgeneric	4.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 8619865f34fb3b130b567855382a5c4aadd522b9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 22, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: enic: fix tx_hang_reset use-after-free on device removal enic_remove() cancels the reset and change_mtu_work items but does not cancel tx_hang_reset. A TX timeout that fires while the device is being removed can schedule enic_tx_hang_reset() so that it runs after free_netdev(), resulting in a use-after-free. cancel_work_sync() alone is not sufficient here: the still-live watchdog and notify paths can re-schedule these work items in the window between the cancel and unregister_netdev(). Use disable_work_sync(), which cancels the work and blocks any subsequent schedule_work() from requeuing it, and apply it to the reset and change_mtu_work items as well so the same requeue race is closed for all teardown work.

Quoted source text, attributed separately from HOL analysis.