Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix UAF via mismatching bpf_prog/attachment RCU flavors Uprobes always use bpf_prog_run_array_uprobe() under tasks-trace-RCU protection. But it is possible to attach a non-sleepable BPF program to a uprobe, and non-sleepable BPF programs are freed via normal RCU (see __bpf_prog_put_noref()). This leads to UAF of the bpf_prog because a normal RCU grace period does not imply a tasks-trace-RCU grace period. Fix it by explicitly waiting for a tasks-trace-RCU grace period after removing the attachment of a bpf_prog to a perf_event.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.0, < 6.1.121 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/9245459a992d22fe0e92e988f49db1fec82c184aPatch
- https://git.kernel.org/stable/c/9b53d2c2a38a1effc341d99be3f99fa7ef17047dPatch
- https://git.kernel.org/stable/c/ef1b808e3b7c98612feceedf985c2fbbeb28f956Patch
- https://git.kernel.org/stable/c/f9f85df30118f3f4112761e6682fc60ebcce23e5Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
FAQ
What is CVE-2024-56675?
CVE-2024-56675 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: bpf: Fix UAF via mismatching bpf_prog/attachment RCU flavors Uprobes always use bpf_prog_run_array_uprobe() under tasks-trace-RCU ...
How severe is CVE-2024-56675?
CVE-2024-56675 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-56675?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.