| 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-2025-37846: arm64: mops: Do not dereference src reg for a set operation |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| arm64: mops: Do not dereference src reg for a set operation |
| |
| The source register is not used for SET* and reading it can result in |
| a UBSAN out-of-bounds array access error, specifically when the MOPS |
| exception is taken from a SET* sequence with XZR (reg 31) as the |
| source. Architecturally this is the only case where a src/dst/size |
| field in the ESR can be reported as 31. |
| |
| Prior to 2de451a329cf662b the code in do_el0_mops() was benign as the |
| use of pt_regs_read_reg() prevented the out-of-bounds access. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37846 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 2de451a329cf662beeba71f63c7f83ee24ca6642 and fixed in 6.12.24 with commit eec737e17e5567e08148550a7f1d94d495b9fb17 |
| Issue introduced in 6.7 with commit 2de451a329cf662beeba71f63c7f83ee24ca6642 and fixed in 6.13.12 with commit 43267d934eacff6c70e15545d804ebbcab8a0bf5 |
| Issue introduced in 6.7 with commit 2de451a329cf662beeba71f63c7f83ee24ca6642 and fixed in 6.14.3 with commit 5f6022a74147675124b781fdc056b291850e7786 |
| Issue introduced in 6.7 with commit 2de451a329cf662beeba71f63c7f83ee24ca6642 and fixed in 6.15 with commit a13bfa4fe0d6949cea14718df2d1fe84c38cd113 |
| |
| 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-2025-37846 |
| 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/arm64/include/asm/traps.h |
| |
| |
| 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/eec737e17e5567e08148550a7f1d94d495b9fb17 |
| https://git.kernel.org/stable/c/43267d934eacff6c70e15545d804ebbcab8a0bf5 |
| https://git.kernel.org/stable/c/5f6022a74147675124b781fdc056b291850e7786 |
| https://git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113 |
