| 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-2024-27394: tcp: Fix Use-After-Free in tcp_ao_connect_init |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tcp: Fix Use-After-Free in tcp_ao_connect_init |
| |
| Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal |
| of tcp_ao_connect_init, 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-2024-27394 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 7c2ffaf21bd67f73d21560995ce17eaf5fc1d37f and fixed in 6.8.9 with commit ca4fb6c6764b3f75b4f5aa81db1536291897ff7f |
| Issue introduced in 6.7 with commit 7c2ffaf21bd67f73d21560995ce17eaf5fc1d37f and fixed in 6.9 with commit 80e679b352c3ce5158f3f778cfb77eb767e586fb |
| |
| 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-2024-27394 |
| 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/tcp_ao.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/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f |
| https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb |
