CVE-2025-21909
wifi: nl80211: reject cooked mode if it is set along with other flags
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wifi: nl80211: reject cooked mode if it is set along with other flags
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 MONITOR_FLAG_COOK_FRAMES and MONITOR_FLAG_ACTIVE flags simultaneously on the same monitor interface from the userspace. This causes a sub-interface to be created with no IEEE80211_SDATA_IN_DRIVER 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 WARN_ONCE() from check_sdata_in_driver() because of missing that bit. Fix this by rejecting MONITOR_FLAG_COOK_FRAMES if it is set along with other flags. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Reserved 2024-12-29 | Published 2025-04-01 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/5ea856d93794c4afa5542defd8c61f2708dc245a
git.kernel.org/...c/351eb7ac53ff1cd94d893c0c4534ced2f36ae7d7
git.kernel.org/...c/cd1bdcb77fdc03c253137e55bae10551b3481461
git.kernel.org/...c/236f41ca728f23210b31ed2d1d8a6df575a4b2d6
git.kernel.org/...c/ebebbb0eded2ed9a1abfa31962f6fb699e6abce7
git.kernel.org/...c/521e55c2b0d6028861ac0a2d06aa57bb0e3ac486
git.kernel.org/...c/ac4860141300581d3e2f6c6dafa37220f7ea9f65
git.kernel.org/...c/49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f
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