CVE-2024-56665 (GCVE-0-2024-56665)
Vulnerability from cvelistv5
Published
2024-12-27 15:06
Modified
2026-05-23 15:55
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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
References
Impacted products
Vendor Product Version
Linux Linux Version: 7a5c653ede645693422e43cccaa3e8f905d21c74
Version: 21db2f35fa97e4a3447f2edeb7b2569a8bfdc83b
Version: 0ee288e69d033850bc87abe0f9cc3ada24763d7f
Version: 0ee288e69d033850bc87abe0f9cc3ada24763d7f
Version: b4007d5fe38625b8a1b8edc0f385d86527651238
Version: 585674b9d0d80bd7f428b1f88be13cf6d5d6f739
Version: 6.1.115   ≤
Version: 6.6.59   ≤
Version: 5.15.170   ≤
Version: 6.11.6   ≤
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