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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2024-56665

bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7a5c653ede645693422e43cccaa3e8f905d21c74 to < 842e5af282453983586e2eae3c8eaf252de5f22faffected
  • 21db2f35fa97e4a3447f2edeb7b2569a8bfdc83b to < c2b6b47662d5f2dfce92e5ffbdcac8229f321d9daffected
  • 0ee288e69d033850bc87abe0f9cc3ada24763d7f to < dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3affected
  • 0ee288e69d033850bc87abe0f9cc3ada24763d7f to < 978c4486cca5c7b9253d3ab98a88c8e769cb9bbdaffected
  • b4007d5fe38625b8a1b8edc0f385d86527651238affected
  • 585674b9d0d80bd7f428b1f88be13cf6d5d6f739affected
  • 6.1.115 to < 6.1.121affected
  • 6.6.59 to < 6.6.67affected
  • 5.15.170 to < 5.16affected
  • 6.11.6 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.12affected
  • 0 to < 6.12unaffected
  • 6.1.121 to ≤ 6.1.*unaffected
  • 6.6.67 to ≤ 6.6.*unaffected
  • 6.12.6 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References