Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 before 9245459a992d22fe0e92e988f49db1fec82c184a; affected 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 before f9f85df30118f3f4112761e6682fc60ebcce23e5; affected 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 before 9b53d2c2a38a1effc341d99be3f99fa7ef17047d; affected 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 before ef1b808e3b7c98612feceedf985c2fbbeb28f956 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.121 through 6.1.*; unaffected 6.6.67 through 6.6.*; unaffected 6.12.6 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.