CVE-2026-23367 wifi: radiotap: reject radiotap with unknown bits

What is CVE-2026-23367?

CVE-2026-23367 is a medium-severity vulnerability in Linux kernel, published on 25 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2026-23367?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-23367?

Apply the vendor's patch.

Is CVE-2026-23367 being exploited?

There is no known exploitation of CVE-2026-23367 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-80739, BELL-CVE-2026-23367, DEBIAN-CVE-2026-23367, GHSA-mg4x-3g76-43w7, ROOT-OS-DEBIAN-11-CVE-2026-23367, ROOT-OS-DEBIAN-12-CVE-2026-23367 and 4 more.