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.
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
8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 to < 9245459a992d22fe0e92e988f49db1fec82c184aaffected8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 to < f9f85df30118f3f4112761e6682fc60ebcce23e5affected8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 to < 9b53d2c2a38a1effc341d99be3f99fa7ef17047daffected8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 to < ef1b808e3b7c98612feceedf985c2fbbeb28f956affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.121 to ≤ 6.1.*unaffected6.6.67 to ≤ 6.6.*unaffected6.12.6 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9245459a992d22fe0e92e988f49db1fec82c184a ↗
- https://git.kernel.org/stable/c/f9f85df30118f3f4112761e6682fc60ebcce23e5 ↗
- https://git.kernel.org/stable/c/9b53d2c2a38a1effc341d99be3f99fa7ef17047d ↗
- https://git.kernel.org/stable/c/ef1b808e3b7c98612feceedf985c2fbbeb28f956 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗