Bug 2536662 (CVE-2026-90346)

Summary: CVE-2026-90346 kernel: wifi: nl80211: clean up color-change beacon data on errors
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's nl80211 Wi-Fi subsystem. This vulnerability allows for a memory leak during the processing of color-change beacon data. Specifically, a parsing failure can occur without proper cleanup of allocated memory. This can lead to resource exhaustion, potentially enabling a remote attacker to cause a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-17 19:03:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: nl80211: clean up color-change beacon data on errors

nl80211_color_change() calls nl80211_parse_beacon() for the beacon_next
template, which can allocate params.beacon_next.mbssid_ies and .rnr_ies.
A parsing failure returned directly instead of using the out: cleanup,
leaking any allocations completed before the error.

Allocate the nested attribute table before parsing beacon_next. Its
allocation failure can then return before beacon data exists, while a
later parsing failure uses out: to release the parsed data.
Comment 1 gkamathe 2026-09-22 05:36:03 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90346.mbox