Description
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
High
Affected products
- Linux / Linux kernel4.14 – 56b88b50565cd8b946a2d00b0c83927b7ebb055e
References
- PATCHhttps://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1
- MISChttps://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4
- PATCHhttps://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.html