| 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-2021-47332: ALSA: usx2y: Don't call free_pages_exact() with NULL address |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: usx2y: Don't call free_pages_exact() with NULL address |
| |
| Unlike some other functions, we can't pass NULL pointer to |
| free_pages_exact(). Add a proper NULL check for avoiding possible |
| Oops. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47332 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.134 with commit 88262229b778f4f7a896da828d966f94dcb35d19 |
| Fixed in 5.10.52 with commit 7d7f30cf182e55023fa8fde4c084b2d37c6be69d |
| Fixed in 5.12.19 with commit bee295f5e03510252d18b25cc1d26230256eb87a |
| Fixed in 5.13.4 with commit 82e5ee742fdd8874fe996181b87fafe1eb5f1196 |
| Fixed in 5.14 with commit cae0cf651adccee2c3f376e78f30fbd788d0829f |
| |
| 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-2021-47332 |
| 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/usb/usx2y/usb_stream.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/88262229b778f4f7a896da828d966f94dcb35d19 |
| https://git.kernel.org/stable/c/7d7f30cf182e55023fa8fde4c084b2d37c6be69d |
| https://git.kernel.org/stable/c/bee295f5e03510252d18b25cc1d26230256eb87a |
| https://git.kernel.org/stable/c/82e5ee742fdd8874fe996181b87fafe1eb5f1196 |
| https://git.kernel.org/stable/c/cae0cf651adccee2c3f376e78f30fbd788d0829f |
