{"api_version":"1","generated_at":"2026-07-25T16:37:34+00:00","cve":"CVE-2026-64213","urls":{"html":"https://cve.report/CVE-2026-64213","api":"https://cve.report/api/cve/CVE-2026-64213.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64213","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64213"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-24 16:16:48","updated_at":"2026-07-24 16:16:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186","name":"https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf","name":"https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","name":"https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64213","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64213","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f bed1fc32e0eb653806fa98afcf55f9a311fc4ce2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f b0b66aae8a94c3663d47e4000b0e81b89ce32186 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f 873e919e3101063a7a75989510ccfc125a4391cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwmon/lm90.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bed1fc32e0eb653806fa98afcf55f9a311fc4ce2","status":"affected","version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","versionType":"git"},{"lessThan":"b0b66aae8a94c3663d47e4000b0e81b89ce32186","status":"affected","version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","versionType":"git"},{"lessThan":"873e919e3101063a7a75989510ccfc125a4391cf","status":"affected","version":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwmon/lm90.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-07-24T15:23:02.987Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2"},{"url":"https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186"},{"url":"https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf"}],"title":"hwmon: (lm90) Add lock protection to lm90_alert","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64213","datePublished":"2026-07-24T15:23:02.987Z","dateReserved":"2026-07-19T15:36:31.770Z","dateUpdated":"2026-07-24T15:23:02.987Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-24 16:16:48","lastModifiedDate":"2026-07-24 16:16:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64213","Ordinal":"1","Title":"hwmon: (lm90) Add lock protection to lm90_alert","CVE":"CVE-2026-64213","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64213","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"hwmon: (lm90) Add lock protection to lm90_alert"}]}}}