{"id":"CVE-2026-90369","state":"PUBLISHED","title":"wifi: mt76: fix out-of-bounds access in mmio copy helpers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix out-of-bounds access in mmio copy helpers\n\nmt76_mmio_write_copy() and mt76_mmio_read_copy() iterate up to\nALIGN(len, 4), so a length that is not a multiple of four reads past the\nsource buffer (write_copy) or writes past the destination (read_copy).\nCopy the aligned body in the loop and handle the remaining tail through a\n4-byte bounce buffer, keeping the register access width unchanged.","publishedAt":"2026-09-17T16:09:10.738Z","updatedAt":"2026-10-19T09:02:28.270Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2df00805f7dbaa46b60c682aad0d76270b7ba266","status":"affected","lessThan":"6ed0fba58bb125a8d8de96e391aa86111166efca","versionType":"git"},{"version":"2df00805f7dbaa46b60c682aad0d76270b7ba266","status":"affected","lessThan":"6689b4a65e88d7b019e687fa9d6943ca070f3e43","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mmio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","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/mmio.c"]}],"references":["https://git.kernel.org/stable/c/6ed0fba58bb125a8d8de96e391aa86111166efca","https://git.kernel.org/stable/c/6689b4a65e88d7b019e687fa9d6943ca070f3e43"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90369.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90369","state":"PUBLISHED","datePublished":"2026-09-17T16:09:10.738Z","dateUpdated":"2026-10-19T09:02:28.270Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.807Z"},"containers":{"cna":{"title":"wifi: mt76: fix out-of-bounds access in mmio copy helpers","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix out-of-bounds access in mmio copy helpers\n\nmt76_mmio_write_copy() and mt76_mmio_read_copy() iterate up to\nALIGN(len, 4), so a length that is not a multiple of four reads past the\nsource buffer (write_copy) or writes past the destination (read_copy).\nCopy the aligned body in the loop and handle the remaining tail through a\n4-byte bounce buffer, keeping the register access width unchanged."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2df00805f7dbaa46b60c682aad0d76270b7ba266","status":"affected","lessThan":"6ed0fba58bb125a8d8de96e391aa86111166efca","versionType":"git"},{"version":"2df00805f7dbaa46b60c682aad0d76270b7ba266","status":"affected","lessThan":"6689b4a65e88d7b019e687fa9d6943ca070f3e43","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mmio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","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/mmio.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6ed0fba58bb125a8d8de96e391aa86111166efca"},{"url":"https://git.kernel.org/stable/c/6689b4a65e88d7b019e687fa9d6943ca070f3e43"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:02:28.270Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}