CVE - CVE-2024-56665

CVE-ID
CVE-2024-56665	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/842e5af282453983586e2eae3c8eaf252de5f22f URL:https://git.kernel.org/stable/c/842e5af282453983586e2eae3c8eaf252de5f22f MISC:https://git.kernel.org/stable/c/978c4486cca5c7b9253d3ab98a88c8e769cb9bbd URL:https://git.kernel.org/stable/c/978c4486cca5c7b9253d3ab98a88c8e769cb9bbd MISC:https://git.kernel.org/stable/c/c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d URL:https://git.kernel.org/stable/c/c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d MISC:https://git.kernel.org/stable/c/dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3 URL:https://git.kernel.org/stable/c/dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3
Assigning CNA
kernel.org
Date Record Created
20241227	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241227)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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