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CVE-2026-98339

HIGHCVSS 8.8/10EPSS 0.18%

Last modified

CVE-2026-98339 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: don't filter by BSS type when removing stale entries When an assoc AP switches to a channel that already has a BSS entry, cfg80211_update_assoc_bss_entry() removes that entry before rehashing the real one, since the two would otherwise collide in the BSS rbtree. The lookup for that entry also required it to match the connection's BSS type, so an entry advertising e.g. the IBSS capability bit was left in place, and the following cfg80211_rehash_bss() then ran into it: WARN_ON(!cmp) Changing the type shouldn't really happen, but can be triggered by a rogue AP/device, so drop the check and remove any entries matching the comparison.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: don't filter by BSS type when removing stale entries When an assoc AP switches to a channel that already has a BSS entry, cfg80211_update_assoc_bss_entry() removes that entry before rehashing the real one, since the two would otherwise collide in the BSS rbtree. The lookup for that entry also required it to match the connection's BSS type, so an entry advertising e.g. the IBSS capability bit was left in place, and the following cfg80211_rehash_bss() then ran into it: WARN_ON(!cmp) Changing the type shouldn't really happen, but can be triggered by a rogue AP/device, so drop the check and remove any entries matching the comparison.

Metrics

CVSS 3.1
8.8/10

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

EPSS Probability
0.18%

7.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 6ef87a853327434ae1cd9c5a2c27a557fb4047fc; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 1380ee3a202dbb9f8e8b3c3b87eb410450d57799; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < fb445ec7480da5d2b82bf681e3b4313603722729; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 65fdb973bd905bc3f5cb045a04c1828f2d2a7e24; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 64e23a36d8f04811372365b44cfca325f8e0f4bb; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < 0aa44982125c86b47961be5ac1c82eddab8080f3; >= 0afd425b1b64251f19b5d8d8b49bf56fefbc643f, < b377e1000d963e7182a987082b4b06580bd7ac84
LinuxLinux5.4

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98339?
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: don't filter by BSS type when removing stale entries When an assoc AP switches to a channel that already has a BSS entry, cfg80211_update_assoc_bss_entry() removes that entry before rehashing the real one, since the two would otherwise collide in the BSS rbtree. The lookup for that entry also required it to match the connection's BSS type, so an entry advertising e.g. the IBSS capability bit was left in place, and the following cfg80211_rehash_bss() then ran into it: WARN_ON(!cmp) Changing the type shouldn't really happen, but can be triggered by a rogue AP/device, so drop the check and remove any entries matching the comparison.
How severe is CVE-2026-98339?
CVE-2026-98339 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98339?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST