Is CVE-2026-23420 in the CISA KEV catalog?

No. CVE-2026-23420 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-23420?

CVE-2026-23420 has a CVSS v3 base score of 5.5 (Moderate).

What is the EPSS score for CVE-2026-23420?

CVE-2026-23420 has an EPSS score of 0.09% (1th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-23420?

Upgrade linux on debian 11 to 5.10.257-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-23420

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wlcore: Fix a locking bug Make sure that wl->mutex is locked before it is unlocked. This has been detected by the Clang thread-safety analyzer.

CWE-667

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.257-1CVE-2026-23420

Fixed in:6.1.170-1CVE-2026-23420

Fixed in:6.12.85-1CVE-2026-23420

Fixed in:6.19.8-1CVE-2026-23420

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.09%probability of exploitation in 30 days

1stpercentile

Low risk: more likely to be exploited than 1% of all known CVEs.

References

Patch8

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-24.