| 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-2021-47207: ALSA: gus: fix null pointer dereference on pointer block |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: gus: fix null pointer dereference on pointer block |
| |
| The pointer block return from snd_gf1_dma_next_block could be |
| null, so there is a potential null pointer dereference issue. |
| Fix this by adding a null check before dereference. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47207 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.293 with commit 3e28e083dcdf03a18a083f8a47b6bb6b1604b5be |
| Fixed in 4.9.291 with commit cb09c760c201f82df83babc92a5ffea0a01807fc |
| Fixed in 4.14.256 with commit 542fa721594a02d2aee0370a764d306ef48d030c |
| Fixed in 4.19.218 with commit ab4c1ebc40f699f48346f634d7b72b9c5193f315 |
| Fixed in 5.4.162 with commit c6d2cefdd05c4810c416fb8d384b5c377bd977bc |
| Fixed in 5.10.82 with commit 1ac6cd87d8ddd36c43620f82c4d65b058f725f0f |
| Fixed in 5.15.5 with commit 16721797dcef2c7c030ffe73a07f39a65f9323c3 |
| Fixed in 5.16 with commit a0d21bb3279476c777434c40d969ea88ca64f9aa |
| |
| 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-2021-47207 |
| 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/isa/gus/gus_dma.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/3e28e083dcdf03a18a083f8a47b6bb6b1604b5be |
| https://git.kernel.org/stable/c/cb09c760c201f82df83babc92a5ffea0a01807fc |
| https://git.kernel.org/stable/c/542fa721594a02d2aee0370a764d306ef48d030c |
| https://git.kernel.org/stable/c/ab4c1ebc40f699f48346f634d7b72b9c5193f315 |
| https://git.kernel.org/stable/c/c6d2cefdd05c4810c416fb8d384b5c377bd977bc |
| https://git.kernel.org/stable/c/1ac6cd87d8ddd36c43620f82c4d65b058f725f0f |
| https://git.kernel.org/stable/c/16721797dcef2c7c030ffe73a07f39a65f9323c3 |
| https://git.kernel.org/stable/c/a0d21bb3279476c777434c40d969ea88ca64f9aa |
