| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21789: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| LoongArch: csum: Fix OoB access in IP checksum code for negative lengths |
| |
| Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit |
| system") would cause an undefined shift and an out-of-bounds read. |
| |
| Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code |
| for negative lengths") fixes the same issue on ARM64. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21789 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 69e3a6aa6be21de6aaf38130fad97ecde34a193c and fixed in 6.6.79 with commit 964a8895704a22efc06a2a3276b624a5ae985a06 |
| Issue introduced in 6.4 with commit 69e3a6aa6be21de6aaf38130fad97ecde34a193c and fixed in 6.12.16 with commit 9f15a8df542c0f08732a67d1a14ee7c22948fb97 |
| Issue introduced in 6.4 with commit 69e3a6aa6be21de6aaf38130fad97ecde34a193c and fixed in 6.13.4 with commit d6508ffff32b44b6d0de06704034e4eef1c307a7 |
| Issue introduced in 6.4 with commit 69e3a6aa6be21de6aaf38130fad97ecde34a193c and fixed in 6.14 with commit 6287f1a8c16138c2ec750953e35039634018c84a |
| |
| 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-2025-21789 |
| 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/loongarch/lib/csum.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/964a8895704a22efc06a2a3276b624a5ae985a06 |
| https://git.kernel.org/stable/c/9f15a8df542c0f08732a67d1a14ee7c22948fb97 |
| https://git.kernel.org/stable/c/d6508ffff32b44b6d0de06704034e4eef1c307a7 |
| https://git.kernel.org/stable/c/6287f1a8c16138c2ec750953e35039634018c84a |
