What is the CVSS score of CVE-2026-23367?

CVE-2026-23367 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Is there a patch available for CVE-2026-23367?

Yes, a patch is available for CVE-2026-23367. Update the affected software to the latest version immediately.

Linux CVE-2026-23367

EUVD-2026-15350 MEDIUM

2026-03-25 Linux

GHSA-mg4x-3g76-43w7

Linux Information Disclosure Red Hat

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

SUSE

5.2 MEDIUM

qualitative

Red Hat

5.5 LOW

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVSS changed

Apr 24, 2026 - 18:52 NVD

5.5 (MEDIUM)

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

EUVD ID Assigned

Mar 25, 2026 - 10:45 euvd

EUVD-2026-15350

Analysis Generated

Mar 25, 2026 - 10:45 vuln.today

CVE Published

Mar 25, 2026 - 10:27 nvd

N/A

DescriptionCVE.org

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

wifi: radiotap: reject radiotap with unknown bits

The radiotap parser is currently only used with the radiotap namespace (not with vendor namespaces), but if the undefined field 18 is used, the alignment/size is unknown as well. In this case, iterator->_next_ns_data isn't initialized (it's only set for skipping vendor namespaces), and syzbot points out that we later compare against this uninitialized value.

Fix this by moving the rejection of unknown radiotap fields down to after the in-namespace lookup, so it will really use iterator->_next_ns_data only for vendor namespaces, even in case undefined fields are present.

AnalysisAI

A use-of-uninitialized-variable vulnerability exists in the Linux kernel's radiotap parser that can lead to information disclosure when processing radiotap frames with undefined fields. The vulnerability affects all Linux kernel versions using the radiotap namespace parser (cpe:2.3:a:linux:linux) and occurs when undefined radiotap field 18 is present, causing the iterator->_next_ns_data variable to be compared against an uninitialized value. While no CVSS score or EPSS data is currently available and there is no indication of active exploitation, the vulnerability has been patched across multiple kernel branches as evidenced by six distinct commit fixes.

Technical ContextAI

The radiotap protocol is a standardized mechanism for carrying per-packet information about wireless frames in the Linux kernel's wireless subsystem. The vulnerability exists in the radiotap frame parser, which iterates through radiotap namespace fields to extract header information. The root cause is an uninitialized variable (iterator->_next_ns_data) that is only set when processing vendor namespaces but is later compared against when undefined fields are encountered. This represents a classic uninitialized variable use (CWE-Variable class) where control flow fails to initialize a variable before its use in a comparison operation. The parser is used during wireless packet reception and filtering, making it a kernel-level component affecting the entire wireless stack.

RemediationAI

Apply kernel updates that include the radiotap parser fix as soon as feasible within normal maintenance windows. Users should identify their running kernel version via 'uname -r' and update to a patched version from their distribution: Red Hat/CentOS users should apply RHSA advisories for kernel updates, Debian/Ubuntu users should run 'apt update && apt upgrade linux-image' to obtain fixed kernel packages, and SUSE users should apply kernel update packages via 'zypper update kernel'. The Linux kernel.org stable branches (5.15.x, 6.1.x, 6.6.x, 6.12.x and later) all contain the fix. Until patching is completed, systems that do not require wireless functionality or can restrict wireless interface access should do so via 'ip link set <interface> down' or disable wireless modules. For systems requiring wireless operation, filtering malformed radiotap frames at network ingress via firewall rules may reduce exposure, though kernel-level patching remains the definitive remediation.

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Vendor StatusVendor

Debian

linux

Release	Status	Fixed Version	Urgency
bullseye	vulnerable	5.10.223-1	-
bullseye (security)	vulnerable	5.10.251-1	-
bookworm	vulnerable	6.1.159-1	-
bookworm (security)	vulnerable	6.1.164-1	-
trixie	vulnerable	6.12.73-1	-
trixie (security)	vulnerable	6.12.74-2	-
forky, sid	fixed	6.19.8-1	-
(unstable)	fixed	6.19.8-1	-

SUSE

Severity: Medium

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed

CVE-2026-23367 vulnerability details – vuln.today

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Linux CVE-2026-23367

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

Same technique Information Disclosure

Vendor StatusVendor

Debian

SUSE

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External POC / Exploit Code