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

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MEDIUM

wifi: radiotap: reject radiotap with unknown bits

Published Mar 25, 2026

5.5

MEDIUM

CVSS 3.1

EPSS 0.12%

Description

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.

Affected products

Vendor Linux Product Linux Default
unaffected
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
- Version
  
  Status
  affected
  Constraints
Vendor Linux Product Linux Default
affected
- Version
  2.6.34
  Status
  affected
  Constraints
  -
- Version
  0
  Status
  unaffected
  Constraints
  <2.6.34
- Version
  5.10.253
  Status
  unaffected
  Constraints
  <=5.10.*
- Version
  5.15.203
  Status
  unaffected
  Constraints
  <=5.15.*
- Version
  6.1.167
  Status
  unaffected
  Constraints
  <=6.1.*
- Version
  6.12.77
  Status
  unaffected
  Constraints
  <=6.12.*
- Version
  6.18.17
  Status
  unaffected
  Constraints
  <=6.18.*
- Version
  6.19.7
  Status
  unaffected
  Constraints
  <=6.19.*
- Version
  6.6.130
  Status
  unaffected
  Constraints
  <=6.6.*
- Version
  7.0
  Status
  unaffected
  Constraints
  <=*

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Linux

unaffected

Version	Status	Constraints
	affected
	affected
	affected
	affected
	affected
	affected
	affected
	affected

Linux

affected

Version	Status	Constraints
2.6.34	affected	-
0	unaffected	<2.6.34
5.10.253	unaffected	<=5.10.*
5.15.203	unaffected	<=5.15.*
6.1.167	unaffected	<=6.1.*
6.12.77	unaffected	<=6.12.*
6.18.17	unaffected	<=6.18.*
6.19.7	unaffected	<=6.19.*
6.6.130	unaffected	<=6.6.*
7.0	unaffected	<=*

Red Hat Enterprise Linux 10

kernel

Fix deferred
Red Hat Enterprise Linux 6

kernel

Out of support scope
Red Hat Enterprise Linux 7

kernel

Fix deferred
Red Hat Enterprise Linux 7

kernel-rt

Fix deferred
Red Hat Enterprise Linux 8

kernel

Fix deferred
Red Hat Enterprise Linux 8

kernel-rt

Fix deferred
Red Hat Enterprise Linux 9

kernel

Fix deferred
Red Hat Enterprise Linux 9

kernel-rt

Fix deferred

Product	Package	State	Advisory
Red Hat Enterprise Linux 10	kernel	Fix deferred	n/a
Red Hat Enterprise Linux 6	kernel	Out of support scope	n/a
Red Hat Enterprise Linux 7	kernel	Fix deferred	n/a
Red Hat Enterprise Linux 7	kernel-rt	Fix deferred	n/a
Red Hat Enterprise Linux 8	kernel	Fix deferred	n/a
Red Hat Enterprise Linux 8	kernel-rt	Fix deferred	n/a
Red Hat Enterprise Linux 9	kernel	Fix deferred	n/a
Red Hat Enterprise Linux 9	kernel-rt	Fix deferred	n/a

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-824

References (12)

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2026-23367		Vendor Advisory
https://git.kernel.org/stable/c/129c8bb320a7cef692c78056ef8e89a2a12ba448		Patch
https://git.kernel.org/stable/c/2a60c588d5d39ad187628f58395c776a97fd4323		Patch
https://git.kernel.org/stable/c/2f8ceeba670610d66f77def32011f48de951d781		Patch
https://git.kernel.org/stable/c/6f80f6a60f5d87e5de5fb2732751fce799991c24		Patch
https://git.kernel.org/stable/c/703fa979badbba83d31cd011606d060bfb8b0d1d		Patch
https://git.kernel.org/stable/c/c854758abe0b8d86f9c43dc060ff56a0ee5b31e0		Patch
https://git.kernel.org/stable/c/d1d1d3c50095928624a95b67a6d7ccc3a18f2215		Patch
https://git.kernel.org/stable/c/e664971759a0e5570b50c6592e58a7f97d55e992		Patch
https://lore.kernel.org/linux-cve-announce/2026032540-CVE-2026-23367-6e44@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-23367
https://www.cve.org/CVERecord?id=CVE-2026-23367