| 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-2025-21762: arp: use RCU protection in arp_xmit() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| arp: use RCU protection in arp_xmit() |
| |
| arp_xmit() can be called without RTNL or RCU protection. |
| |
| Use RCU protection to avoid potential UAF. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21762 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 5.4.291 with commit 10f555e3f573d004ae9d89b3276abb58c4ede5c3 |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 5.10.235 with commit 307cd1e2d3cb1cbc6c40c679cada6d7168b18431 |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 5.15.179 with commit d9366ac2f956a1948b68c0500f84a3462ff2ed8a |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 6.1.129 with commit f189654459423d4d48bef2d120b4bfba559e6039 |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 6.6.79 with commit e9f4dee534eb1b225b0a120395ad9bc2afe164d3 |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 6.12.16 with commit 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 6.13.4 with commit 2c331718d3389b6c5f6855078ab7171849e016bd |
| Issue introduced in 4.4 with commit 29a26a56803855a79dbd028cd61abee56237d6e5 and fixed in 6.14 with commit a42b69f692165ec39db42d595f4f65a4c8f42e44 |
| |
| 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-2025-21762 |
| 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/ipv4/arp.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/10f555e3f573d004ae9d89b3276abb58c4ede5c3 |
| https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431 |
| https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a |
| https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039 |
| https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3 |
| https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe |
| https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd |
| https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44 |
