CVE-2026-80991
Açıklama (NVD)
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.
Yayın: 11.09.2026 · Son değişiklik: 30.10.2026
CVSS 3.1 metrikleri
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Saldırı vektörü | Yerel |
| Karmaşıklık | Düşük |
| Gereken yetki | Düşük |
| Kullanıcı etkileşimi | Gerekmez |
| Kapsam | Değişmez |
| Gizlilik | Yüksek |
| Bütünlük | Yüksek |
| Erişilebilirlik | Yüksek |
Hesaplanan temel puan: 7.8. CVSS hesaplayıcıda incele
Referanslar
- https://git.kernel.org/stable/c/0400b9c5608933289bcacc3886dd3e4f6b7695f1
- https://git.kernel.org/stable/c/1cb9663789c5b7a12fcd419fcca6d6254c398252
- https://git.kernel.org/stable/c/66b50c31419e7946e9aa325a468ad9b64c961a25
- https://git.kernel.org/stable/c/67a82e6f886beed0de8f8da08bb767e68fba952d
- https://git.kernel.org/stable/c/695acb5534a9e366efb47b40c7487fc56488b09b
- https://git.kernel.org/stable/c/b917f37bfcce919a969d66a044580a95b11df31c