{"id":"CVE-2026-90373","state":"PUBLISHED","title":"wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear\n\nmt7915_remove_interface() cleared the wcid mask bit with no lock held and\nbefore clearing the RCU wcid pointer. The mask is a non-atomic RMW shared\nwith the allocators, which all run under dev->mt76.mutex; on DBDC the two\nwiphys share one mt76_dev, so this raced add_interface/sta_add on the\nother band and could leak or double-hand-out a wcid. Clearing the bit\nbefore the RCU pointer also let a concurrent allocation reuse the index\nand publish its wcid, which the subsequent NULL assignment then wiped.\nMove the clear into the existing mutex section, after the RCU pointer is\ncleared.","publishedAt":"2026-09-17T16:09:13.368Z","updatedAt":"2026-10-30T12:35:23.858Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"5dce25f1d609ba991a9c22c27be586c92f03ed77","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"b4a41a47a67c788e6b0625fa517ec8872e99bb6c","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba","versionType":"git"},{"version":"b7c8e22dfddacc1b08dbf44f5be2c66305d757bc","status":"affected","versionType":"git"},{"version":"a582b1d54313dcdc96e7d8e1f49495dd71ddaf3e","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7915/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7915/main.c"]}],"references":["https://git.kernel.org/stable/c/5dce25f1d609ba991a9c22c27be586c92f03ed77","https://git.kernel.org/stable/c/b4a41a47a67c788e6b0625fa517ec8872e99bb6c","https://git.kernel.org/stable/c/a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b","https://git.kernel.org/stable/c/6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba"],"weaknesses":[],"ingestedAt":"2026-10-30T12:54:04.478Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90373.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90373","state":"PUBLISHED","datePublished":"2026-09-17T16:09:13.368Z","dateUpdated":"2026-10-30T12:35:23.858Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.808Z"},"containers":{"cna":{"title":"wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear\n\nmt7915_remove_interface() cleared the wcid mask bit with no lock held and\nbefore clearing the RCU wcid pointer. The mask is a non-atomic RMW shared\nwith the allocators, which all run under dev->mt76.mutex; on DBDC the two\nwiphys share one mt76_dev, so this raced add_interface/sta_add on the\nother band and could leak or double-hand-out a wcid. Clearing the bit\nbefore the RCU pointer also let a concurrent allocation reuse the index\nand publish its wcid, which the subsequent NULL assignment then wiped.\nMove the clear into the existing mutex section, after the RCU pointer is\ncleared."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"5dce25f1d609ba991a9c22c27be586c92f03ed77","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"b4a41a47a67c788e6b0625fa517ec8872e99bb6c","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b","versionType":"git"},{"version":"f3049b88b2b32326df97461813ae73e8bbc296fc","status":"affected","lessThan":"6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba","versionType":"git"},{"version":"b7c8e22dfddacc1b08dbf44f5be2c66305d757bc","status":"affected","versionType":"git"},{"version":"a582b1d54313dcdc96e7d8e1f49495dd71ddaf3e","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7915/main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7915/main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5dce25f1d609ba991a9c22c27be586c92f03ed77"},{"url":"https://git.kernel.org/stable/c/b4a41a47a67c788e6b0625fa517ec8872e99bb6c"},{"url":"https://git.kernel.org/stable/c/a97b2b942d2f8f12fbd6a7caafc735d1ad115e6b"},{"url":"https://git.kernel.org/stable/c/6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:35:23.858Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.160"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}