What’s Vulnerable › Vulnerabilities

CVE-2025-37822: riscv: uprobes: Add missing fence.i after building the XOL buffer

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-08 · updated 2026-10-15

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.

Affected products

• Linux kernel: from 5.12 before 6.12.26; from 6.13 before 6.14.5; 6.15-rc1, 6.15-rc2, 6.15-rc3 — fixed in 6.12.26, 6.14.5

How to fix

Upgrade to a fixed version: Linux kernel 6.12.26, 6.14.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978
• https://git.kernel.org/stable/c/77c956152a3a7c7a18b68f3654f70565b2181d03
• https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48
• https://git.kernel.org/stable/c/b6d8d4d01ca8514fa89b05355f296758a91e2297
• https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2
• https://git.kernel.org/stable/c/be6d98766ac952d38241d5a5b213f363afa421c3

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