What is CVE-2023-0266?

CVE-2023-0266 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.9/10. Published 2023-01-30.

How severe is CVE-2023-0266?

High severity. CVSS v3 base score is 7.9 out of 10.

Is CVE-2023-0266 known to be exploited?

Yes. CVE-2023-0266 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-03-30), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.

Use After Free in Linux Kernel

CVE-2023-0266

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 fr…

Vulnerability class: Use-After-Free

EPSS: 0.002 (39.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H.

Affected products

Linux Kernel — versions 4.14

Weakness classification (CWE)

CWE-416 — Use After Free

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-03-30. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-04-20.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-0266?: CVE-2023-0266 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.9/10. Published 2023-01-30.
How severe is CVE-2023-0266?: High severity. CVSS v3 base score is 7.9 out of 10.
Is CVE-2023-0266 known to be exploited?: Yes. CVE-2023-0266 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-03-30), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.