| 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-2025-21761: openvswitch: use RCU protection in ovs_vport_cmd_fill_info() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| openvswitch: use RCU protection in ovs_vport_cmd_fill_info() |
| |
| ovs_vport_cmd_fill_info() can be called without RTNL or RCU. |
| |
| Use RCU protection and dev_net_rcu() to avoid potential UAF. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21761 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 5.4.291 with commit e85a25d1a9985645e796039e843d1de581d2de1e |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 5.10.235 with commit a8816b3f1f151373fd30f1996f00480126c8bb11 |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 5.15.179 with commit a884f57600e463f69d7b279c4598b865260b62a1 |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 6.1.129 with commit 7e01abc34e87abd091e619161a20f54ed4e3e2da |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 6.6.79 with commit 8ec57509c36c8b9a23e50b7858dda0c520a2d074 |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 6.12.16 with commit a849a10de5e04d798f7f286a2f1ca174719a617a |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 6.13.4 with commit 5828937742af74666192835d657095d95c53dbd0 |
| Issue introduced in 4.15 with commit 9354d452034273a50a4fd703bea31e5d6b1fc20b and fixed in 6.14 with commit 90b2f49a502fa71090d9f4fe29a2f51fe5dff76d |
| |
| 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-2025-21761 |
| 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/openvswitch/datapath.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/e85a25d1a9985645e796039e843d1de581d2de1e |
| https://git.kernel.org/stable/c/a8816b3f1f151373fd30f1996f00480126c8bb11 |
| https://git.kernel.org/stable/c/a884f57600e463f69d7b279c4598b865260b62a1 |
| https://git.kernel.org/stable/c/7e01abc34e87abd091e619161a20f54ed4e3e2da |
| https://git.kernel.org/stable/c/8ec57509c36c8b9a23e50b7858dda0c520a2d074 |
| https://git.kernel.org/stable/c/a849a10de5e04d798f7f286a2f1ca174719a617a |
| https://git.kernel.org/stable/c/5828937742af74666192835d657095d95c53dbd0 |
| https://git.kernel.org/stable/c/90b2f49a502fa71090d9f4fe29a2f51fe5dff76d |
