| 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-2021-47096: ALSA: rawmidi - fix the uninitalized user_pversion |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: rawmidi - fix the uninitalized user_pversion |
| |
| The user_pversion was uninitialized for the user space file structure |
| in the open function, because the file private structure use |
| kmalloc for the allocation. |
| |
| The kernel ALSA sequencer code clears the file structure, so no additional |
| fixes are required. |
| |
| BugLink: https://github.com/alsa-project/alsa-lib/issues/178 |
| |
| The Linux kernel CVE team has assigned CVE-2021-47096 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 09d23174402da0f10e98da2c61bb5ac8e7d79fdd and fixed in 5.15.12 with commit b398fcbe4de1e1100867fdb6f447c6fbc8fe7085 |
| Issue introduced in 5.15 with commit 09d23174402da0f10e98da2c61bb5ac8e7d79fdd and fixed in 5.16 with commit 39a8fc4971a00d22536aeb7d446ee4a97810611b |
| Issue introduced in 5.14.10 with commit 12d50801497235956fb3760be8530f4e44e4ce67 |
| |
| 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-2021-47096 |
| 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/rawmidi.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/b398fcbe4de1e1100867fdb6f447c6fbc8fe7085 |
| https://git.kernel.org/stable/c/39a8fc4971a00d22536aeb7d446ee4a97810611b |
