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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-80991

net: ravb: serialize PTP clock teardown

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Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < 0400b9c5608933289bcacc3886dd3e4f6b7695f1affected
  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < b917f37bfcce919a969d66a044580a95b11df31caffected
  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < 695acb5534a9e366efb47b40c7487fc56488b09baffected
  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < 67a82e6f886beed0de8f8da08bb767e68fba952daffected
  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < 66b50c31419e7946e9aa325a468ad9b64c961a25affected
  • a0d2f20650e81407d8e51ad2cbdc492861c74e9c to < 1cb9663789c5b7a12fcd419fcca6d6254c398252affected

Linux Linux

Default version status: affected

  • 4.2affected
  • 0 to < 4.2unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.109 to ≤ 6.12.*unaffected
  • 6.18.50 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References