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.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978 Patch
- https://git.kernel.org/stable/c/77c956152a3a7c7a18b68f3654f70565b2181d03 Patch
- https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48 Patch
- https://git.kernel.org/stable/c/b6d8d4d01ca8514fa89b05355f296758a91e2297 Patch
- https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2 Patch
- https://git.kernel.org/stable/c/be6d98766ac952d38241d5a5b213f363afa421c3 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.8 · linuxNVD modified 2026-10-15 22:18
Affected (CPE criteria) 4
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
References 6
- https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978 Patch
- https://git.kernel.org/stable/c/77c956152a3a7c7a18b68f3654f70565b2181d03 Patch
- https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48 Patch
- https://git.kernel.org/stable/c/b6d8d4d01ca8514fa89b05355f296758a91e2297 Patch
- https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2 Patch
- https://git.kernel.org/stable/c/be6d98766ac952d38241d5a5b213f363afa421c3 Patch