Orta CVSS 5.5
CVE-2024-35895: Linux Kernel: güvenlik açığı
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Prevent lock inversion deadlock in map delete elem syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); <Interrupt> lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today.
Özet bilgiler
- Ürün
- Linux Linux Kernel
- CVSS v3.1
- 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS
- %0,18 (yüzdelik 8)
- CWE
- CWE-667
- Yama
- Mevcut
Etkilenen sürümler
| Ürün | Başlangıç | Bitiş | Düzeltildi |
|---|---|---|---|
| linux-linux-kernel | 4.20 | — | 5.4.274 |
| linux-linux-kernel | 5.5 | — | 5.10.215 |
| linux-linux-kernel | 5.11 | — | 5.15.154 |
| linux-linux-kernel | 5.16 | — | 6.1.85 |
| linux-linux-kernel | 6.2 | — | 6.6.26 |
| linux-linux-kernel | 6.7 | — | 6.8.5 |
| linux-linux-kernel | 6.9 | 6.9 | — |
| linux-linux-kernel | 6.9 | 6.9 | — |
| debian-debian-linux | 10.0 | 10.0 | — |