Description
In the Linux kernel, the following vulnerability has been resolved:
riscv: uprobes: Add missing fence.i after building the XOL buffer
The XOL (execute out-of-line) buffer is used to single-step the replaced instruction(s) for uprobes. The RISC-V port was missing a proper fence.i (i$ flushing) after constructing the XOL buffer, which can result in incorrect execution of stale/broken instructions.
This was found running the BPF selftests "test_progs: uprobe_autoattach, attach_probe" on the Spacemit K1/X60, where the uprobes tests randomly blew up.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < be6d98766ac952d38241d5a5b213f363afa421c3; >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < b6d8d4d01ca8514fa89b05355f296758a91e2297; >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < 77c956152a3a7c7a18b68f3654f70565b2181d03; >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < bcf6d3158c5902d92b6d62335af4422b7bf7c4e2; >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < 1dbb95a36499374c51b47ee8ae258a8862c20978; >= 74784081aac8a0f3636965fc230e2d3b7cc123c6, < 7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48 |
| Linux | Linux | 5.12 |
References
- https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978Patch
- https://git.kernel.org/stable/c/77c956152a3a7c7a18b68f3654f70565b2181d03Patch
- https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48Patch
- https://git.kernel.org/stable/c/b6d8d4d01ca8514fa89b05355f296758a91e2297Patch
- https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2Patch
- https://git.kernel.org/stable/c/be6d98766ac952d38241d5a5b213f363afa421c3Patch
Timeline
- Published
- May 8, 2025
- Last modified
- Oct 15, 2026
- NVD status
- Modified