| 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-2024-53236: xsk: Free skb when TX metadata options are invalid |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| xsk: Free skb when TX metadata options are invalid |
| |
| When a new skb is allocated for transmitting an xsk descriptor, i.e., for |
| every non-multibuf descriptor or the first frag of a multibuf descriptor, |
| but the descriptor is later found to have invalid options set for the TX |
| metadata, the new skb is never freed. This can leak skbs until the send |
| buffer is full which makes sending more packets impossible. |
| |
| Fix this by freeing the skb in the error path if we are currently dealing |
| with the first frag, i.e., an skb allocated in this iteration of |
| xsk_build_skb. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53236 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.11.11 with commit 7f0d0dd5a7f437d83cff954bc321f1a9b181efd5 |
| Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.12.2 with commit d5d346deb65efa8453f8481bcea75c1a590439e7 |
| Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.13 with commit 0c0d0f42ffa6ac94cd79893b7ed419c15e1b45de |
| |
| 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-2024-53236 |
| 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/xdp/xsk.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/7f0d0dd5a7f437d83cff954bc321f1a9b181efd5 |
| https://git.kernel.org/stable/c/d5d346deb65efa8453f8481bcea75c1a590439e7 |
| https://git.kernel.org/stable/c/0c0d0f42ffa6ac94cd79893b7ed419c15e1b45de |
