Use After Free Affecting kernel-debug package, versions <0:4.18.0-305.86.2.el8_4
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-5406875
- published 23 Jan 2023
- disclosed 13 Jan 2023
Introduced: 13 Jan 2023
CVE-2023-0266 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug to version 0:4.18.0-305.86.2.el8_4 or higher.
This issue was patched in RHSA-2023:1557.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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
References
- https://access.redhat.com/security/cve/CVE-2023-0266
- https://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
- https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e
- https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog