| 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-2024-43864: net/mlx5e: Fix CT entry update leaks of modify header context |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5e: Fix CT entry update leaks of modify header context |
| |
| The cited commit allocates a new modify header to replace the old |
| one when updating CT entry. But if failed to allocate a new one, eg. |
| exceed the max number firmware can support, modify header will be |
| an error pointer that will trigger a panic when deallocating it. And |
| the old modify header point is copied to old attr. When the old |
| attr is freed, the old modify header is lost. |
| |
| Fix it by restoring the old attr to attr when failed to allocate a |
| new modify header context. So when the CT entry is freed, the right |
| modify header context will be freed. And the panic of accessing |
| error pointer is also fixed. |
| |
| The Linux kernel CVE team has assigned CVE-2024-43864 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit 94ceffb48eac7692677d8093dcde6965b70c4b35 and fixed in 6.6.45 with commit daab2cc17b6b6ab158566bba037e9551fd432b59 |
| Issue introduced in 6.3 with commit 94ceffb48eac7692677d8093dcde6965b70c4b35 and fixed in 6.10.4 with commit 89064d09c56b44c668509bf793c410484f63f5ad |
| Issue introduced in 6.3 with commit 94ceffb48eac7692677d8093dcde6965b70c4b35 and fixed in 6.11 with commit 025f2b85a5e5a46df14ecf162c3c80a957a36d0b |
| |
| 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-2024-43864 |
| 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/en/tc_ct.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/daab2cc17b6b6ab158566bba037e9551fd432b59 |
| https://git.kernel.org/stable/c/89064d09c56b44c668509bf793c410484f63f5ad |
| https://git.kernel.org/stable/c/025f2b85a5e5a46df14ecf162c3c80a957a36d0b |
