| 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-2024-57893: ALSA: seq: oss: Fix races at processing SysEx messages |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: seq: oss: Fix races at processing SysEx messages |
| |
| OSS sequencer handles the SysEx messages split in 6 bytes packets, and |
| ALSA sequencer OSS layer tries to combine those. It stores the data |
| in the internal buffer and this access is racy as of now, which may |
| lead to the out-of-bounds access. |
| |
| As a temporary band-aid fix, introduce a mutex for serializing the |
| process of the SysEx message packets. |
| |
| The Linux kernel CVE team has assigned CVE-2024-57893 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.124 with commit cff1de87ed14fc0f2332213d2367100e7ad0753a |
| Fixed in 6.6.70 with commit d2392b79d8af3714ea8878b71c66dc49d3110f44 |
| Fixed in 6.12.9 with commit 9d382112b36382aa65aad765f189ebde9926c101 |
| Fixed in 6.13 with commit 0179488ca992d79908b8e26b9213f1554fc5bacc |
| |
| 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-2024-57893 |
| 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: |
| sound/core/seq/oss/seq_oss_synth.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/cff1de87ed14fc0f2332213d2367100e7ad0753a |
| https://git.kernel.org/stable/c/d2392b79d8af3714ea8878b71c66dc49d3110f44 |
| https://git.kernel.org/stable/c/9d382112b36382aa65aad765f189ebde9926c101 |
| https://git.kernel.org/stable/c/0179488ca992d79908b8e26b9213f1554fc5bacc |
