| From bippy-7c5fe7eed585 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-2025-21997: xsk: fix an integer overflow in xp_create_and_assign_umem() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| xsk: fix an integer overflow in xp_create_and_assign_umem() |
| |
| Since the i and pool->chunk_size variables are of type 'u32', |
| their product can wrap around and then be cast to 'u64'. |
| This can lead to two different XDP buffers pointing to the same |
| memory area. |
| |
| Found by InfoTeCS on behalf of Linux Verification Center |
| (linuxtesting.org) with SVACE. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21997 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.16 with commit 94033cd8e73b8632bab7c8b7bb54caa4f5616db7 and fixed in 6.1.132 with commit 205649d642a5b376724f04f3a5b3586815e43d3b |
| Issue introduced in 5.16 with commit 94033cd8e73b8632bab7c8b7bb54caa4f5616db7 and fixed in 6.6.85 with commit b7b4be1fa43294b50b22e812715198629806678a |
| Issue introduced in 5.16 with commit 94033cd8e73b8632bab7c8b7bb54caa4f5616db7 and fixed in 6.12.21 with commit 130290f44bce0eead2b827302109afc3fe189ddd |
| Issue introduced in 5.16 with commit 94033cd8e73b8632bab7c8b7bb54caa4f5616db7 and fixed in 6.13.9 with commit c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd |
| Issue introduced in 5.16 with commit 94033cd8e73b8632bab7c8b7bb54caa4f5616db7 and fixed in 6.14 with commit 559847f56769037e5b2e0474d3dbff985b98083d |
| |
| 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-2025-21997 |
| 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: |
| net/xdp/xsk_buff_pool.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/205649d642a5b376724f04f3a5b3586815e43d3b |
| https://git.kernel.org/stable/c/b7b4be1fa43294b50b22e812715198629806678a |
| https://git.kernel.org/stable/c/130290f44bce0eead2b827302109afc3fe189ddd |
| https://git.kernel.org/stable/c/c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd |
| https://git.kernel.org/stable/c/559847f56769037e5b2e0474d3dbff985b98083d |
