| 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-2024-27395: net: openvswitch: Fix Use-After-Free in ovs_ct_exit |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: openvswitch: Fix Use-After-Free in ovs_ct_exit |
| |
| Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal |
| of ovs_ct_limit_exit, is not part of the RCU read critical section, it |
| is possible that the RCU grace period will pass during the traversal and |
| the key will be free. |
| |
| To prevent this, it should be changed to hlist_for_each_entry_safe. |
| |
| The Linux kernel CVE team has assigned CVE-2024-27395 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 4.19.313 with commit 2db9a8c0a01fa1c762c1e61a13c212c492752994 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 5.4.275 with commit 589523cf0b384164e445dd5db8d5b1bf97982424 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 5.10.216 with commit 35880c3fa6f8fe281a19975d2992644588ca33d3 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 5.15.158 with commit 9048616553c65e750d43846f225843ed745ec0d4 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 6.1.90 with commit bca6fa2d9a9f560e6b89fd5190b05cc2f5d422c1 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 6.6.30 with commit eaa5e164a2110d2fb9e16c8a29e4501882235137 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 6.8.9 with commit edee0758747d7c219e29db9ed1d4eb33e8d32865 |
| Issue introduced in 4.18 with commit 11efd5cb04a184eea4f57b68ea63dddd463158d1 and fixed in 6.9 with commit 5ea7b72d4fac2fdbc0425cd8f2ea33abe95235b2 |
| |
| 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-2024-27395 |
| 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/conntrack.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/2db9a8c0a01fa1c762c1e61a13c212c492752994 |
| https://git.kernel.org/stable/c/589523cf0b384164e445dd5db8d5b1bf97982424 |
| https://git.kernel.org/stable/c/35880c3fa6f8fe281a19975d2992644588ca33d3 |
| https://git.kernel.org/stable/c/9048616553c65e750d43846f225843ed745ec0d4 |
| https://git.kernel.org/stable/c/bca6fa2d9a9f560e6b89fd5190b05cc2f5d422c1 |
| https://git.kernel.org/stable/c/eaa5e164a2110d2fb9e16c8a29e4501882235137 |
| https://git.kernel.org/stable/c/edee0758747d7c219e29db9ed1d4eb33e8d32865 |
| https://git.kernel.org/stable/c/5ea7b72d4fac2fdbc0425cd8f2ea33abe95235b2 |
