Exploited
high
7.9
CWE
416
Advisory Published
CVE Published
Updated

CVE-2023-0266: Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

First published: Mon Jan 23 2023(Updated: )

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

Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
redhat/Kernel<6.2
6.2
Android
Red Hat Kernel-devel
Linux Kernel>=4.14<4.14.303
Linux Kernel>=4.15<4.19.270
Linux Kernel>=4.20<5.4.229
Linux Kernel>=5.5<5.10.163
Linux Kernel>=5.11<5.15.88
Linux Kernel>=5.16<6.1.6
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1

Remedy

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

Remedy

https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e

Remedy

https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-0266?

    CVE-2023-0266 is classified as a high severity vulnerability due to its potential for privilege escalation.

  • How do I fix CVE-2023-0266?

    To mitigate CVE-2023-0266, upgrade to Linux Kernel versions 6.2 or apply the appropriate patches provided in the latest updates.

  • Which systems are affected by CVE-2023-0266?

    CVE-2023-0266 affects multiple versions of the Linux Kernel, particularly those between 4.14 and 6.1.6.

  • What is the type of vulnerability associated with CVE-2023-0266?

    CVE-2023-0266 is a use-after-free vulnerability that arises from missing locks in the ALSA PCM package.

  • What can attackers achieve by exploiting CVE-2023-0266?

    Exploitation of CVE-2023-0266 could allow attackers to gain ring0 access, leading to complete control of the affected system.

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