{"id":"CVE-2026-64213","summary":"hwmon: (lm90) Add lock protection to lm90_alert","details":"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-\u003econfig, 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-\u003econfig\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.","modified":"2026-07-27T04:03:19.869979773Z","published":"2026-07-24T15:23:02.987Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64213.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64213.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64213"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7a1d220ccb0cc2b808eb176fb05bf55a38179f3f"},{"fixed":"bed1fc32e0eb653806fa98afcf55f9a311fc4ce2"},{"fixed":"b0b66aae8a94c3663d47e4000b0e81b89ce32186"},{"fixed":"873e919e3101063a7a75989510ccfc125a4391cf"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64213.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64213.json"}}],"schema_version":"1.7.5"}