What is the severity of CVE-2026-23191?

CVE-2026-23191 has a CVSS v3 score of 0, which is classified as Low severity.

Is there an exploit available for CVE-2026-23191?

No known public exploits are currently available for CVE-2026-23191.

Is there a patch available for CVE-2026-23191?

Yes, patches are available for CVE-2026-23191. Check the vendor advisories for update instructions.

CVE-2026-23191 - CVE Details, Severity, and Analysis

Severity Scores

CVSS v30.0

CVSS v20.0

Priority Score0.0

EPSS Score0.0

None

Exploitation LikelihoodMinimal

0.00%EPSS

Very low probability of exploitation

Monitor and patch as resources allow

0.00%

EPSS

0.0

CVSS

No

Exploit

Yes

Patch

Low Priority

no major risk factors

EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.

Description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: aloop: Fix racy access at PCM trigger

The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are performed outside the cable lock, this may result in UAF when a program attempts to trigger frequently while opening/closing the tied stream, as spotted by fuzzers.

For addressing the UAF, this patch changes two things:

It covers the most of code in loopback_check_format() with cable->lock spinlock, and add the proper NULL checks. This avoids already some racy accesses.
In addition, now we try to check the state of the capture PCM stream that may be stopped in this function, which was the major pain point leading to UAF.

CVSS v3 Breakdown

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