| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37966: riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL |
| |
| When userspace does PR_SET_TAGGED_ADDR_CTRL, but Supm extension is not |
| available, the kernel crashes: |
| |
| Oops - illegal instruction [#1] |
| [snip] |
| epc : set_tagged_addr_ctrl+0x112/0x15a |
| ra : set_tagged_addr_ctrl+0x74/0x15a |
| epc : ffffffff80011ace ra : ffffffff80011a30 sp : ffffffc60039be10 |
| [snip] |
| status: 0000000200000120 badaddr: 0000000010a79073 cause: 0000000000000002 |
| set_tagged_addr_ctrl+0x112/0x15a |
| __riscv_sys_prctl+0x352/0x73c |
| do_trap_ecall_u+0x17c/0x20c |
| andle_exception+0x150/0x15c |
| |
| Fix it by checking if Supm is available. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37966 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.13 with commit 09d6775f503b393d0457c7126aa43208e1724004 and fixed in 6.14.7 with commit 4b595a2f5656cd45d534ed2160c94f7662adefe5 |
| Issue introduced in 6.13 with commit 09d6775f503b393d0457c7126aa43208e1724004 and fixed in 6.15 with commit ae08d55807c099357c047dba17624b09414635dd |
| |
| 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-2025-37966 |
| 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/process.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/4b595a2f5656cd45d534ed2160c94f7662adefe5 |
| https://git.kernel.org/stable/c/ae08d55807c099357c047dba17624b09414635dd |
