CVE-2025-21909

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Source
https://cve.org/CVERecord?id=CVE-2025-21909
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21909.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21909
Downstream
Related
Published
2025-04-01T15:40:48.680Z
Modified
2026-03-11T07:54:32.046318049Z
Summary
wifi: nl80211: reject cooked mode if it is set along with other flags
Details

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

wifi: nl80211: reject cooked mode if it is set along with other flags

It is possible to set both MONITORFLAGCOOKFRAMES and MONITORFLAGACTIVE flags simultaneously on the same monitor interface from the userspace. This causes a sub-interface to be created with no IEEE80211SDATAINDRIVER bit set because the monitor interface is in the cooked state and it takes precedence over all other states. When the interface is then being deleted the kernel calls WARNONCE() from checksdataindriver() because of missing that bit.

Fix this by rejecting MONITORFLAGCOOK_FRAMES if it is set along with other flags.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21909.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a
Fixed
5ea856d93794c4afa5542defd8c61f2708dc245a
Fixed
351eb7ac53ff1cd94d893c0c4534ced2f36ae7d7
Fixed
cd1bdcb77fdc03c253137e55bae10551b3481461
Fixed
236f41ca728f23210b31ed2d1d8a6df575a4b2d6
Fixed
ebebbb0eded2ed9a1abfa31962f6fb699e6abce7
Fixed
521e55c2b0d6028861ac0a2d06aa57bb0e3ac486
Fixed
ac4860141300581d3e2f6c6dafa37220f7ea9f65
Fixed
49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21909.json"