CVE-2026-74725
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.
CSIRTS triage
- What
- The enic driver has a use-after-free vulnerability in tx_hang_reset during device removal.
- Who is affected
- Systems running affected Linux kernel versions with Cisco UCS enic network drivers.
- Urgency
- Medium severity (CVSS 4.1); not currently exploited but can cause system crash on device removal.
- Action
- Update to a patched Linux kernel version addressing CVE-2026-74725.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-74725
Get an email if CVE-2026-74725 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-74725)