Linux Kernel up to 7.3-rc3 cfg80211 cfg80211_update_assoc_bss_entry comparison

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.60-

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel up to 7.3-rc3. Affected by this vulnerability is the function cfg80211_update_assoc_bss_entry of the component cfg80211. Such manipulation leads to comparison. This vulnerability is referenced as CVE-2026-98339. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.3-rc3. It has been rated as problematic. Affected by this issue is the function cfg80211_update_assoc_bss_entry of the component cfg80211. The manipulation with an unknown input leads to a comparison vulnerability. Using CWE to declare the problem leads to CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. Impacted is integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-98339 since 09/25/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/06/2026).

Upgrading to version 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch 6ef87a853327434ae1cd9c5a2c27a557fb4047fc/1380ee3a202dbb9f8e8b3c3b87eb410450d57799/fb445ec7480da5d2b82bf681e3b4313603722729/65fdb973bd905bc3f5cb045a04c1828f2d2a7e24/64e23a36d8f04811372365b44cfca325f8e0f4bb/6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25/0aa44982125c86b47961be5ac1c82eddab8080f3/b377e1000d963e7182a987082b4b06580bd7ac84 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Comparison
CWE: CWE-697
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.271/5.15.222/6.1.189/6.6.158/6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: 6ef87a853327434ae1cd9c5a2c27a557fb4047fc/1380ee3a202dbb9f8e8b3c3b87eb410450d57799/fb445ec7480da5d2b82bf681e3b4313603722729/65fdb973bd905bc3f5cb045a04c1828f2d2a7e24/64e23a36d8f04811372365b44cfca325f8e0f4bb/6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25/0aa44982125c86b47961be5ac1c82eddab8080f3/b377e1000d963e7182a987082b4b06580bd7ac84

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98339 (🔒)
GCVE (CVE): GCVE-0-2026-98339
GCVE (VulDB): GCVE-100-414260

Entryinfo

Created: 10/06/2026 14:07
Changes: 10/06/2026 14:07 (59)
Complete: 🔍
Cache ID: 216::103

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