| 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-2025-21763: neighbour: use RCU protection in __neigh_notify() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| neighbour: use RCU protection in __neigh_notify() |
| |
| __neigh_notify() can be called without RTNL or RCU protection. |
| |
| Use RCU protection to avoid potential UAF. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21763 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 5.4.291 with commit e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 5.10.235 with commit 8666e9aab801328c1408a19fbf4070609dc0695a |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 5.15.179 with commit 40d8f2f2a373b6c294ffac394d2bb814b572ead1 |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 6.1.129 with commit 784eb2376270e086f7db136d154b8404edacf97b |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 6.6.79 with commit 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 6.12.16 with commit cdd5c2a12ddad8a77ce1838ff9f29aa587de82df |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 6.13.4 with commit 559307d25235e24b5424778c7332451b6c741159 |
| Issue introduced in 2.6.25 with commit 426b5303eb435d98b9bee37a807be386bc2b3320 and fixed in 6.14 with commit becbd5850c03ed33b232083dd66c6e38c0c0e569 |
| |
| 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-2025-21763 |
| 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/core/neighbour.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/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32 |
| https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a |
| https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1 |
| https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b |
| https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379 |
| https://git.kernel.org/stable/c/cdd5c2a12ddad8a77ce1838ff9f29aa587de82df |
| https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159 |
| https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569 |
