| 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-2024-53150: ALSA: usb-audio: Fix out of bounds reads when finding clock sources |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: usb-audio: Fix out of bounds reads when finding clock sources |
| |
| The current USB-audio driver code doesn't check bLength of each |
| descriptor at traversing for clock descriptors. That is, when a |
| device provides a bogus descriptor with a shorter bLength, the driver |
| might hit out-of-bounds reads. |
| |
| For addressing it, this patch adds sanity checks to the validator |
| functions for the clock descriptor traversal. When the descriptor |
| length is shorter than expected, it's skipped in the loop. |
| |
| For the clock source and clock multiplier descriptors, we can just |
| check bLength against the sizeof() of each descriptor type. |
| OTOH, the clock selector descriptor of UAC2 and UAC3 has an array |
| of bNrInPins elements and two more fields at its tail, hence those |
| have to be checked in addition to the sizeof() check. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53150 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.287 with commit a632bdcb359fd8145e86486ff8612da98e239acd |
| Fixed in 5.10.231 with commit 45a92cbc88e4013bfed7fd2ccab3ade45f8e896b |
| Fixed in 5.15.174 with commit ab011f7439d9bbfd34fd3b9cef4b2d6d952c9bb9 |
| Fixed in 6.1.120 with commit da13ade87a12dd58829278bc816a61bea06a56a9 |
| Fixed in 6.6.64 with commit 74cb86e1006c5437b1d90084d22018da30fddc77 |
| Fixed in 6.11.11 with commit ea0fa76f61cf8e932d1d26e6193513230816e11d |
| Fixed in 6.12.2 with commit 096bb5b43edf755bc4477e64004fa3a20539ec2f |
| Fixed in 6.13 with commit a3dd4d63eeb452cfb064a13862fb376ab108f6a6 |
| |
| 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-2024-53150 |
| 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/clock.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/a632bdcb359fd8145e86486ff8612da98e239acd |
| https://git.kernel.org/stable/c/45a92cbc88e4013bfed7fd2ccab3ade45f8e896b |
| https://git.kernel.org/stable/c/ab011f7439d9bbfd34fd3b9cef4b2d6d952c9bb9 |
| https://git.kernel.org/stable/c/da13ade87a12dd58829278bc816a61bea06a56a9 |
| https://git.kernel.org/stable/c/74cb86e1006c5437b1d90084d22018da30fddc77 |
| https://git.kernel.org/stable/c/ea0fa76f61cf8e932d1d26e6193513230816e11d |
| https://git.kernel.org/stable/c/096bb5b43edf755bc4477e64004fa3a20539ec2f |
| https://git.kernel.org/stable/c/a3dd4d63eeb452cfb064a13862fb376ab108f6a6 |
