CVSS 5.5 · Medium EPSS 0,22%
Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog Syzbot reported [1] crash that happens for following tracing scenario: - create tracepoint perf event with attr.inherit=1, attach it to the process and set bpf program to it - attached process forks -> chid creates inherited event the new child event shares the parent's bpf program and tp_event (hence prog_array) which is global for tracepoint - exit both process and its child -> release both events - first perf_event_detach_bpf_prog call will release tp_event->prog_array and second perf_event_detach_bpf_prog will crash, because tp_event->prog_array is NULL The fix makes sure the perf_event_detach_bpf_prog checks prog_array is valid before it tries to remove the bpf program from it. [1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.15.170 hingga sebelum 5.16 |
| linux | linux kernel | Versi 6.1.115 hingga sebelum 6.1.121 |
| linux | linux kernel | Versi 6.6.59 hingga sebelum 6.6.67 |
| linux | linux kernel | Versi 6.11.6 hingga sebelum 6.12.6 |
| linux | linux kernel | Versi 6.13 rc1 |
| linux | linux kernel | Versi 6.13 rc2 |