wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90373
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:36 UTC
Updated2026-10-30 13:20:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear mt7915_remove_interface() cleared the wcid mask bit with no lock held and before clearing the RCU wcid pointer. The mask is a non-atomic RMW shared with the allocators, which all run under dev->mt76.mutex; on DBDC the two wiphys share one mt76_dev, so this raced add_interface/sta_add on the other band and could leak or double-hand-out a wcid. Clearing the bit before the RCU pointer also let a concurrent allocation reuse the index and publish its wcid, which the subsequent NULL assignment then wiped. Move the clear into the existing mutex section, after the RCU pointer is cleared.

Risk And Classification

EPSS: 0.002010000 probability, percentile 0.099840000 (date 2026-11-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f3049b88b2b32326df97461813ae73e8bbc296fc 5dce25f1d609ba991a9c22c27be586c92f03ed77 git Not specified
CNA Linux Linux affected f3049b88b2b32326df97461813ae73e8bbc296fc b4a41a47a67c788e6b0625fa517ec8872e99bb6c git Not specified
CNA Linux Linux affected f3049b88b2b32326df97461813ae73e8bbc296fc a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b git Not specified
CNA Linux Linux affected f3049b88b2b32326df97461813ae73e8bbc296fc 6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba git Not specified
CNA Linux Linux affected b7c8e22dfddacc1b08dbf44f5be2c66305d757bc git Not specified
CNA Linux Linux affected a582b1d54313dcdc96e7d8e1f49495dd71ddaf3e git Not specified
CNA Linux Linux affected 6.1.191 6.2 semver Not specified
CNA Linux Linux affected 6.6.160 6.7 semver Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5dce25f1d609ba991a9c22c27be586c92f03ed77 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b4a41a47a67c788e6b0625fa517ec8872e99bb6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report