| 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-2024-44986: ipv6: fix possible UAF in ip6_finish_output2() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ipv6: fix possible UAF in ip6_finish_output2() |
| |
| If skb_expand_head() returns NULL, skb has been freed |
| and associated dst/idev could also have been freed. |
| |
| We need to hold rcu_read_lock() to make sure the dst and |
| associated idev are alive. |
| |
| The Linux kernel CVE team has assigned CVE-2024-44986 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 5796015fa968a3349027a27dcd04c71d95c53ba5 and fixed in 5.15.166 with commit e891b36de161fcd96f12ff83667473e5067b9037 |
| Issue introduced in 5.14 with commit 5796015fa968a3349027a27dcd04c71d95c53ba5 and fixed in 6.1.107 with commit 3574d28caf9a09756ae87ad1ea096c6f47b6101e |
| Issue introduced in 5.14 with commit 5796015fa968a3349027a27dcd04c71d95c53ba5 and fixed in 6.6.48 with commit 6ab6bf731354a6fdbaa617d1ec194960db61cf3b |
| Issue introduced in 5.14 with commit 5796015fa968a3349027a27dcd04c71d95c53ba5 and fixed in 6.10.7 with commit 56efc253196751ece1fc535a5b582be127b0578a |
| Issue introduced in 5.14 with commit 5796015fa968a3349027a27dcd04c71d95c53ba5 and fixed in 6.11 with commit da273b377ae0d9bd255281ed3c2adb228321687b |
| Issue introduced in 5.4.137 with commit ded37d03440d0ab346a8287cc2ba88b8dc90ceb0 |
| Issue introduced in 5.10.55 with commit 2323690eb05865a657709f4d28eb9538ea97bfc2 |
| Issue introduced in 5.13.7 with commit b34c668a867ffdcf8bd8db4a36512572e82b4a15 |
| |
| 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-2024-44986 |
| 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/ip6_output.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/e891b36de161fcd96f12ff83667473e5067b9037 |
| https://git.kernel.org/stable/c/3574d28caf9a09756ae87ad1ea096c6f47b6101e |
| https://git.kernel.org/stable/c/6ab6bf731354a6fdbaa617d1ec194960db61cf3b |
| https://git.kernel.org/stable/c/56efc253196751ece1fc535a5b582be127b0578a |
| https://git.kernel.org/stable/c/da273b377ae0d9bd255281ed3c2adb228321687b |
