VulnerabilityPublished 24 Jul 2026Updated 21 Oct 2026

CVE-2026-64213: Linux kernel · hwmon: (lm90) Add lock protection to lm90_alert

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in bed1fc32e0eb653806fa98afcf55f9a311fc4ce2 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 15:59 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in bed1fc32e0eb653806fa98afcf55f9a311fc4ce2, b0b66aae8a94c3663d47e4000b0e81b89ce32186, 873e919e3101063a7a75989510ccfc125a4391cf +2

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < bed1fc32e0eb653806fa98afcf55f9a311fc4ce2	Fixed in bed1fc32e0eb653806fa98afcf55f9a311fc4ce2
LinuxLinux	Affected ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < b0b66aae8a94c3663d47e4000b0e81b89ce32186	Fixed in b0b66aae8a94c3663d47e4000b0e81b89ce32186
LinuxLinux	Affected ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 873e919e3101063a7a75989510ccfc125a4391cf	Fixed in 873e919e3101063a7a75989510ccfc125a4391cf
LinuxLinux	Affected ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e	Fixed in 165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e
LinuxLinux	Affected ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 02b88fa993582b4fe228b4143b330b0bb9f28353	Fixed in 02b88fa993582b4fe228b4143b330b0bb9f28353
LinuxLinux	Affected =5.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Add lock protection to lm90_alert Sashiko reports: lm90_alert() executes in the smbus alert context and calls lm90_update_confreg() to disable the hardware alert line, without acquiring hwmon_lock. Concurrently, sysfs write operations (such as lm90_write_convrate) hold the hwmon_lock, temporarily modify data->config, and then restore it. If an alert interrupt occurs concurrently with a sysfs write, the sysfs path will overwrite the alert handler's modifications to data->config and the hardware register. This unintentionally re-enables the hardware alert line while the alarm is still active, causing an interrupt storm. Add the missing lock to lm90_alert() to solve the problem.

References

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