{"id":"CVE-2026-64213","state":"PUBLISHED","title":"hwmon: (lm90) Add lock protection to lm90_alert","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (lm90) Add lock protection to lm90_alert\n\nSashiko reports:\n\nlm90_alert() executes in the smbus alert context and calls\nlm90_update_confreg() to disable the hardware alert line, without\nacquiring hwmon_lock.\n\nConcurrently, sysfs write operations (such as lm90_write_convrate) hold\nthe hwmon_lock, temporarily modify data->config, and then restore it.\n\nIf an alert interrupt occurs concurrently with a sysfs write, the sysfs\npath will overwrite the alert handler's modifications to data->config\nand the hardware register.\n\nThis unintentionally re-enables the hardware alert line while the alarm is\nstill active, causing an interrupt storm.\n\nAdd the missing lock to lm90_alert() to solve the problem.","publishedAt":"2026-07-24T15:23:02.987Z","updatedAt":"2026-10-30T12:27:41.554Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"1dc6a3469b5427e3bfd19010d7755ebc6019abc1","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"02b88fa993582b4fe228b4143b330b0bb9f28353","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"b0b66aae8a94c3663d47e4000b0e81b89ce32186","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"873e919e3101063a7a75989510ccfc125a4391cf","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/lm90.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","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":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","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/hwmon/lm90.c"]}],"references":["https://git.kernel.org/stable/c/1dc6a3469b5427e3bfd19010d7755ebc6019abc1","https://git.kernel.org/stable/c/02b88fa993582b4fe228b4143b330b0bb9f28353","https://git.kernel.org/stable/c/165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e","https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186","https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64213.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64213","state":"PUBLISHED","datePublished":"2026-07-24T15:23:02.987Z","dateUpdated":"2026-10-30T12:27:41.554Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.770Z"},"containers":{"cna":{"title":"hwmon: (lm90) Add lock protection to lm90_alert","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (lm90) Add lock protection to lm90_alert\n\nSashiko reports:\n\nlm90_alert() executes in the smbus alert context and calls\nlm90_update_confreg() to disable the hardware alert line, without\nacquiring hwmon_lock.\n\nConcurrently, sysfs write operations (such as lm90_write_convrate) hold\nthe hwmon_lock, temporarily modify data->config, and then restore it.\n\nIf an alert interrupt occurs concurrently with a sysfs write, the sysfs\npath will overwrite the alert handler's modifications to data->config\nand the hardware register.\n\nThis unintentionally re-enables the hardware alert line while the alarm is\nstill active, causing an interrupt storm.\n\nAdd the missing lock to lm90_alert() to solve the problem."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"1dc6a3469b5427e3bfd19010d7755ebc6019abc1","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"02b88fa993582b4fe228b4143b330b0bb9f28353","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"b0b66aae8a94c3663d47e4000b0e81b89ce32186","versionType":"git"},{"version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","status":"affected","lessThan":"873e919e3101063a7a75989510ccfc125a4391cf","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/lm90.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","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":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","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/hwmon/lm90.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1dc6a3469b5427e3bfd19010d7755ebc6019abc1"},{"url":"https://git.kernel.org/stable/c/02b88fa993582b4fe228b4143b330b0bb9f28353"},{"url":"https://git.kernel.org/stable/c/165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e"},{"url":"https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2"},{"url":"https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186"},{"url":"https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:27:41.554Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}