{"id":"CVE-2026-46136","state":"PUBLISHED","title":"wifi: mt76: mt7921: fix a potential clc buffer length underflow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921: fix a potential clc buffer length underflow\n\nThe buf_len is used to limit the iterations for retrieving the country\npower setting and may underflow under certain conditions due to changes\nin the power table in CLC.\n\nThis underflow leads to an almost infinite loop or an invalid power\nsetting resulting in driver initialization failure.","publishedAt":"2026-05-28T09:35:52.004Z","updatedAt":"2026-10-15T01:20:45.666Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0c9318d49e501a5d50b02bd91a4813bde2353488","status":"affected","lessThan":"2a79b1a492bcfa725383b6580cd93a6862308c85","versionType":"git"},{"version":"15173a1697236793e9e900b82fece6f99d41b2a7","status":"affected","lessThan":"e451c325b000b9a0081fd93bc6d103d6943d4b55","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"90cc573fd2f46ddbc2c329e7814b5ba3deb7b939","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"0aa63d33742b805d1a218d18d12b983cce4b2f7b","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"a0111847f0b4f6023f6dd320114697514e024ba3","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"5373f8b19e568b5c217832b9bbef165bd2b2df14","versionType":"git"},{"version":"5c8cac512844ad593d31258e215908014381bee2","status":"affected","versionType":"git"},{"version":"6.1.75","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.14","status":"affected","lessThan":"6.6.140","versionType":"semver"},{"version":"6.7.2","status":"affected","lessThan":"6.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7921/mcu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","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/mt7921/mcu.c"]}],"references":["https://git.kernel.org/stable/c/2a79b1a492bcfa725383b6580cd93a6862308c85","https://git.kernel.org/stable/c/e451c325b000b9a0081fd93bc6d103d6943d4b55","https://git.kernel.org/stable/c/90cc573fd2f46ddbc2c329e7814b5ba3deb7b939","https://git.kernel.org/stable/c/0aa63d33742b805d1a218d18d12b983cce4b2f7b","https://git.kernel.org/stable/c/a0111847f0b4f6023f6dd320114697514e024ba3","https://git.kernel.org/stable/c/5373f8b19e568b5c217832b9bbef165bd2b2df14","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46136.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46136","state":"PUBLISHED","datePublished":"2026-05-28T09:35:52.004Z","dateUpdated":"2026-10-15T01:20:45.666Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.099Z"},"containers":{"cna":{"title":"wifi: mt76: mt7921: fix a potential clc buffer length underflow","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921: fix a potential clc buffer length underflow\n\nThe buf_len is used to limit the iterations for retrieving the country\npower setting and may underflow under certain conditions due to changes\nin the power table in CLC.\n\nThis underflow leads to an almost infinite loop or an invalid power\nsetting resulting in driver initialization failure."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0c9318d49e501a5d50b02bd91a4813bde2353488","status":"affected","lessThan":"2a79b1a492bcfa725383b6580cd93a6862308c85","versionType":"git"},{"version":"15173a1697236793e9e900b82fece6f99d41b2a7","status":"affected","lessThan":"e451c325b000b9a0081fd93bc6d103d6943d4b55","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"90cc573fd2f46ddbc2c329e7814b5ba3deb7b939","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"0aa63d33742b805d1a218d18d12b983cce4b2f7b","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"a0111847f0b4f6023f6dd320114697514e024ba3","versionType":"git"},{"version":"fa6ad88e023ddfa6c5dcdb466d159e89f451e305","status":"affected","lessThan":"5373f8b19e568b5c217832b9bbef165bd2b2df14","versionType":"git"},{"version":"5c8cac512844ad593d31258e215908014381bee2","status":"affected","versionType":"git"},{"version":"6.1.75","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.14","status":"affected","lessThan":"6.6.140","versionType":"semver"},{"version":"6.7.2","status":"affected","lessThan":"6.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7921/mcu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","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/mt7921/mcu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2a79b1a492bcfa725383b6580cd93a6862308c85"},{"url":"https://git.kernel.org/stable/c/e451c325b000b9a0081fd93bc6d103d6943d4b55"},{"url":"https://git.kernel.org/stable/c/90cc573fd2f46ddbc2c329e7814b5ba3deb7b939"},{"url":"https://git.kernel.org/stable/c/0aa63d33742b805d1a218d18d12b983cce4b2f7b"},{"url":"https://git.kernel.org/stable/c/a0111847f0b4f6023f6dd320114697514e024ba3"},{"url":"https://git.kernel.org/stable/c/5373f8b19e568b5c217832b9bbef165bd2b2df14"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:57:08.679Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.75","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.14","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-15T01:20:45.666Z"},"x_adpType":"supplier"}]}}}