ZeusQA
Start free

Known exploited vulnerability

CVE-2023-0266

highCVSS 3.1 7.0In CISA KEVEPSS 2.6%Published · Linux

The short answer

CVE-2023-0266 affects Linux Linux Kernel and is rated high (CVSS 7.0). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-03-30: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

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

Weakness: CWE-416.

Severity

7.0 high

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Mar 30, 2023

Federal due date Apr 20, 2023

EPSS, next 30 days

2.6%

Higher than 85% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Linux Kernel. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-0266 being exploited?

Yes. CISA added CVE-2023-0266 to its Known Exploited Vulnerabilities catalog on 2023-03-30, with a federal remediation due date of 2023-04-20.

How do I fix CVE-2023-0266?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

Related

Know the day a CVE lands in your code

Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.

Start freeSee how a run works