CVE-2026-80991

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-80991

Key Details

CVE	CVE-2026-80991
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

net: ravb: serialize PTP clock teardown

ravb_ptp_interrupt() can race with ravb_ptp_stop() and pass the clock to

ptp_clock_event() while ptp_clock_unregister() is freeing it. This can

lead to a use-after-free.

Use READ_ONCE() and WRITE_ONCE() for lockless access to the clock pointer.

Atomically detach it with xchg() before disabling PTP interrupts, then

synchronize all IRQs which can invoke ravb_ptp_interrupt() before

unregistering the detached clock.

A handler which read the old pointer completes before the clock is

unregistered, while later handlers read NULL and skip the event. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80991
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80991

Source

Reference

NVD

CVE