Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c before b917f37bfcce919a969d66a044580a95b11df31c; affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c before 695acb5534a9e366efb47b40c7487fc56488b09b; affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c before 67a82e6f886beed0de8f8da08bb767e68fba952d; affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c before 66b50c31419e7946e9aa325a468ad9b64c961a25; affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c before 1cb9663789c5b7a12fcd419fcca6d6254c398252 |
| Linux / Linux | affected 4.2; unaffected 0 before 4.2; unaffected 6.6.160 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b917f37bfcce919a969d66a044580a95b11df31c
- https://git.kernel.org/stable/c/695acb5534a9e366efb47b40c7487fc56488b09b
- https://git.kernel.org/stable/c/67a82e6f886beed0de8f8da08bb767e68fba952d
- https://git.kernel.org/stable/c/66b50c31419e7946e9aa325a468ad9b64c961a25
- https://git.kernel.org/stable/c/1cb9663789c5b7a12fcd419fcca6d6254c398252