CVE-2026-23367

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

Published

2026-03-25

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/129c8bb320a7cef692c78056ef8e89a2a12ba448
• https://git.kernel.org/stable/c/2a60c588d5d39ad187628f58395c776a97fd4323
• https://git.kernel.org/stable/c/2f8ceeba670610d66f77def32011f48de951d781
• https://git.kernel.org/stable/c/6f80f6a60f5d87e5de5fb2732751fce799991c24
• https://git.kernel.org/stable/c/703fa979badbba83d31cd011606d060bfb8b0d1d

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