wifi: mac80211: refuse to make a monitor active when it has no queue

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98182
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:02 UTC
Updated2026-10-06 09:18:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: refuse to make a monitor active when it has no queue A monitor interface only gets a TXQ if it's created active, and one can't be added later. Setting the flag on a down interface is still allowed, so the driver is handed a monitor with no queue. ath9k dereferences it: BUG: kernel NULL pointer dereference, address: 0000000000000066 RIP: 0010:ath_tx_node_init+0x49/0x170 [ath9k] ath9k_add_interface+0x10c/0x140 [ath9k] drv_add_interface+0x54/0x250 [mac80211] ieee80211_do_open+0x32f/0x800 [mac80211] Reached with CAP_NET_ADMIN by "iw dev X set monitor active" followed by "ip link set X up". RTNL is held, so netlink operations block behind it. Refuse the flag when there is no queue to give.

Risk And Classification

EPSS: 0.001750000 probability, percentile 0.063860000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 b7b7d46ec4fa127767931938b282c361c0519af6 git Not specified
CNA Linux Linux affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 abe15e643e576459469867758ae9c586a7bab95d git Not specified
CNA Linux Linux affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 46c223468537a05a404699771cd3e68532dab5e6 git Not specified
CNA Linux Linux affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 2b04d6556964ae9f89819b86a0a7801e39c3aae5 git Not specified
CNA Linux Linux affected 4.15 Not specified
CNA Linux Linux unaffected 4.15 semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2b04d6556964ae9f89819b86a0a7801e39c3aae5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b7b7d46ec4fa127767931938b282c361c0519af6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/46c223468537a05a404699771cd3e68532dab5e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/abe15e643e576459469867758ae9c586a7bab95d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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