{"id":"CVE-2026-53102","state":"PUBLISHED","title":"wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()\n\nmt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to\nbe freed eventually by mt76_mcu_skb_send_msg(). However, currently if\nan intermediate function fails before sending, the allocated skb is\nleaked.\n\nSpecifically, mt76_connac_mcu_sta_wed_update() and\nmt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory\nleak in the error path.\n\nFix this by explicitly freeing the skb in these error paths.\nCommit 7c0f63fe37a5 (\"wifi: mt76: mt7996: fix memory leak on\nmt7996_mcu_sta_key_tlv error\") made a similar change.\n\nCompile tested only. Issue found using a prototype static analysis tool\nand code review.","publishedAt":"2026-06-24T16:30:38.536Z","updatedAt":"2026-10-30T12:26:38.678Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"25af8229133c8dc69b12721ad84165cced83caed","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"a2af91af9536922edc3f63de90c3f1fe9db71717","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"7de35b99503012e57bec027e98ed53f881518b5b","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"8527ac1bce87aaabde6755e8e6eb2a9f439d1292","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"eb466406d2094deefadc2cd6ddb4f6eeb086d1b4","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"c41075ce8cf05ed8c0e7b7efef000dce548ffc42","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c","drivers/net/wireless/mediatek/mt76/mt7915/mcu.c","drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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/mt76_connac_mcu.c","drivers/net/wireless/mediatek/mt76/mt7915/mcu.c","drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"]}],"references":["https://git.kernel.org/stable/c/25af8229133c8dc69b12721ad84165cced83caed","https://git.kernel.org/stable/c/a2af91af9536922edc3f63de90c3f1fe9db71717","https://git.kernel.org/stable/c/7de35b99503012e57bec027e98ed53f881518b5b","https://git.kernel.org/stable/c/8527ac1bce87aaabde6755e8e6eb2a9f439d1292","https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4","https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53102.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53102","state":"PUBLISHED","datePublished":"2026-06-24T16:30:38.536Z","dateUpdated":"2026-10-30T12:26:38.678Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.384Z"},"containers":{"cna":{"title":"wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()\n\nmt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to\nbe freed eventually by mt76_mcu_skb_send_msg(). However, currently if\nan intermediate function fails before sending, the allocated skb is\nleaked.\n\nSpecifically, mt76_connac_mcu_sta_wed_update() and\nmt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory\nleak in the error path.\n\nFix this by explicitly freeing the skb in these error paths.\nCommit 7c0f63fe37a5 (\"wifi: mt76: mt7996: fix memory leak on\nmt7996_mcu_sta_key_tlv error\") made a similar change.\n\nCompile tested only. Issue found using a prototype static analysis tool\nand code review."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"25af8229133c8dc69b12721ad84165cced83caed","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"a2af91af9536922edc3f63de90c3f1fe9db71717","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"7de35b99503012e57bec027e98ed53f881518b5b","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"8527ac1bce87aaabde6755e8e6eb2a9f439d1292","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"eb466406d2094deefadc2cd6ddb4f6eeb086d1b4","versionType":"git"},{"version":"6683d988089ce0e80bd859a9493333b6b272420e","status":"affected","lessThan":"c41075ce8cf05ed8c0e7b7efef000dce548ffc42","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c","drivers/net/wireless/mediatek/mt76/mt7915/mcu.c","drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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/mt76_connac_mcu.c","drivers/net/wireless/mediatek/mt76/mt7915/mcu.c","drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/25af8229133c8dc69b12721ad84165cced83caed"},{"url":"https://git.kernel.org/stable/c/a2af91af9536922edc3f63de90c3f1fe9db71717"},{"url":"https://git.kernel.org/stable/c/7de35b99503012e57bec027e98ed53f881518b5b"},{"url":"https://git.kernel.org/stable/c/8527ac1bce87aaabde6755e8e6eb2a9f439d1292"},{"url":"https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4"},{"url":"https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:38.678Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}