CVE-2024-56675
bpf: Fix UAF via mismatching bpf_prog/attachment RCU flavors
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Dec 27, 2024 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 < 9245459a992d22fe0e92e988f49db1fec82c184a 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 < f9f85df30118f3f4112761e6682fc60ebcce23e5 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 < 9b53d2c2a38a1effc341d99be3f99fa7ef17047d 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 < ef1b808e3b7c98612feceedf985c2fbbeb28f956
Linux / Linux
6.0
References
git.kernel.org: https://git.kernel.org/stable/c/9245459a992d22fe0e92e988f49db1fec82c184a git.kernel.org: https://git.kernel.org/stable/c/f9f85df30118f3f4112761e6682fc60ebcce23e5 git.kernel.org: https://git.kernel.org/stable/c/9b53d2c2a38a1effc341d99be3f99fa7ef17047d git.kernel.org: https://git.kernel.org/stable/c/ef1b808e3b7c98612feceedf985c2fbbeb28f956 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html