| 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-2022-49288: ALSA: pcm: Fix races among concurrent prealloc proc writes |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: pcm: Fix races among concurrent prealloc proc writes |
| |
| We have no protection against concurrent PCM buffer preallocation |
| changes via proc files, and it may potentially lead to UAF or some |
| weird problem. This patch applies the PCM open_mutex to the proc |
| write operation for avoiding the racy proc writes and the PCM stream |
| open (and further operations). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49288 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.279 with commit e7786c445bb67a9a6e64f66ebd6b7215b153ff7d |
| Fixed in 4.19.243 with commit e14dca613e0a6ddc2bf6e360f16936a9f865205b |
| Fixed in 5.4.193 with commit 37b12c16beb6f6c1c3c678c1aacbc46525c250f7 |
| Fixed in 5.10.109 with commit b560d670c87d7d40b3cf6949246fa4c7aa65a00a |
| Fixed in 5.15.32 with commit 51fce708ab8986a9879ee5da946a2cc120f1036d |
| Fixed in 5.16.18 with commit a21d2f323b5a978dedf9ff1d50f101f85e39b3f2 |
| Fixed in 5.17.1 with commit 5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6 |
| Fixed in 5.18 with commit 69534c48ba8ce552ce383b3dfdb271ffe51820c3 |
| |
| 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-2022-49288 |
| 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/pcm_memory.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/e7786c445bb67a9a6e64f66ebd6b7215b153ff7d |
| https://git.kernel.org/stable/c/e14dca613e0a6ddc2bf6e360f16936a9f865205b |
| https://git.kernel.org/stable/c/37b12c16beb6f6c1c3c678c1aacbc46525c250f7 |
| https://git.kernel.org/stable/c/b560d670c87d7d40b3cf6949246fa4c7aa65a00a |
| https://git.kernel.org/stable/c/51fce708ab8986a9879ee5da946a2cc120f1036d |
| https://git.kernel.org/stable/c/a21d2f323b5a978dedf9ff1d50f101f85e39b3f2 |
| https://git.kernel.org/stable/c/5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6 |
| https://git.kernel.org/stable/c/69534c48ba8ce552ce383b3dfdb271ffe51820c3 |
