CVE-2026-80991
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
41/100
Published: 2026-09-11
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
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.
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 0400b9c5608933289bcacc3886dd3e4f6b7695f1 |
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < b917f37bfcce919a969d66a044580a95b11df31c |
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 695acb5534a9e366efb47b40c7487fc56488b09b |
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 67a82e6f886beed0de8f8da08bb767e68fba952d |
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 66b50c31419e7946e9aa325a468ad9b64c961a25 |
| Linux | Linux | a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 1cb9663789c5b7a12fcd419fcca6d6254c398252 |
| Linux | Linux | 4.2 |