| 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-2025-21765: ipv6: use RCU protection in ip6_default_advmss() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ipv6: use RCU protection in ip6_default_advmss() |
| |
| ip6_default_advmss() needs rcu protection to make |
| sure the net structure it reads does not disappear. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21765 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 5.4.291 with commit 78ad057472d8c76e0602402269222f9f9c698790 |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 5.10.235 with commit d02f30d220ef9511568a48dba8a9004c65f8d904 |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 5.15.179 with commit 28de355b63ad42309ed5a03ee7c436c90512265b |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 6.1.129 with commit 84212387caadb211cd9dadd6fd5563bd37dc1f5e |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 6.6.79 with commit 4176a68b0db8fc74ac14fcd00ba8231371051dc2 |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 6.12.16 with commit 713a40c892f40300d63691d9f85b2a23b48fe1e8 |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 6.13.4 with commit 550ed693f47370502a71b85382e7f9e6417300b8 |
| Issue introduced in 2.6.26 with commit 5578689a4e3c04f2d43ea39736fd3fa396d80c6e and fixed in 6.14 with commit 3c8ffcd248da34fc41e52a46e51505900115fc2a |
| |
| 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-2025-21765 |
| 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/ipv6/route.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/78ad057472d8c76e0602402269222f9f9c698790 |
| https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904 |
| https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265b |
| https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e |
| https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2 |
| https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8 |
| https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8 |
| https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a |
