CVE-2023-0266: Linux Kernel Use-After-Free Vulnerability

CVE-2023-0266 · Severity: critical · CVSS 7.9 · Exploited in the wild · Published 2023-03-30

A use-after-free vulnerability in the ALSA PCM package of the Linux Kernel occurs due to missing locks in SNDRV_CTL_IOCTL_ELEM_READ/WRITE32. This flaw allows a local system user to escalate privileges to ring0 access.

Technologies: Linux Kernel. Vendors: Linux.

Quick answers

Is CVE-2023-0266 exploited in the wild?
Yes. CVE-2023-0266 is known to be exploited in the wild, first recorded on 30 March 2023. Treat it as urgent.
How severe is CVE-2023-0266?
Critical severity, with a CVSS score of 7.9, published 30 March 2023.
Which products and versions are affected?
Linux Linux Kernel up to (excluding) 6.2, 6.2 rc1; Debian Debian Linux 10.0.
Is there a fix for CVE-2023-0266?
A patch was published on 2023-01-12: Mainline kernel commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2023-0266 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2023-0266?
Check whether you run Linux Kernel. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Linux Linux Kernel up to (excluding) 6.2, 6.2 rc1
  • Debian Debian Linux 10.0

Timeline

  • 2023-03-30: disclosed
  • 2023-03-30: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2023-03-30: advisory
  • 2023-01-12: patched: Mainline kernel commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e

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