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Message-ID: <2025050821-CVE-2025-37822-9fef@gregkh> Date: Thu, 8 May 2025 08:39:31 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-37822: riscv: uprobes: Add missing fence.i after building the XOL buffer From: Greg Kroah-Hartman <gregkh@...nel.org> 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. The Linux kernel CVE team has assigned CVE-2025-37822 to this issue. Affected and fixed versions =========================== Issue introduced in 5.12 with commit 74784081aac8a0f3636965fc230e2d3b7cc123c6 and fixed in 6.12.26 with commit bcf6d3158c5902d92b6d62335af4422b7bf7c4e2 Issue introduced in 5.12 with commit 74784081aac8a0f3636965fc230e2d3b7cc123c6 and fixed in 6.14.5 with commit 1dbb95a36499374c51b47ee8ae258a8862c20978 Issue introduced in 5.12 with commit 74784081aac8a0f3636965fc230e2d3b7cc123c6 and fixed in 6.15-rc4 with commit 7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2025-37822 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: arch/riscv/kernel/probes/uprobes.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2 https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978 https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48
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