| 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-2025-21800: net/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset |
| |
| When bit offset for HWS_SET32 macro is negative, |
| UBSAN complains about the shift-out-of-bounds: |
| |
| UBSAN: shift-out-of-bounds in |
| drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c:177:2 |
| shift exponent -8 is negative |
| |
| The Linux kernel CVE team has assigned CVE-2025-21800 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.12.13 with commit 92cff996624c4757d5bbace3dfa3f1567ba94143 |
| Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.13.2 with commit 69c676c0ded472713e6d1b3a456b3c4f52f66f0e |
| Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.14 with commit be482f1d10da781db9445d2753c1e3f1fd82babf |
| |
| 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-2025-21800 |
| 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: |
| drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.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/92cff996624c4757d5bbace3dfa3f1567ba94143 |
| https://git.kernel.org/stable/c/69c676c0ded472713e6d1b3a456b3c4f52f66f0e |
| https://git.kernel.org/stable/c/be482f1d10da781db9445d2753c1e3f1fd82babf |
