hwmon: (lm90) Only report alarms if driver is ready

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74552
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:18:00 UTC
Updated2026-08-15 13:18:00 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Only report alarms if driver is ready Userspace can read sysfs attributes before driver registration is complete, immediately after devm_hwmon_device_register_with_info() has been called. At that time, data->hwmon_dev is not yet initialized. This can trigger a NULL pointer access since lm90_update_device() and with it lm90_update_alarms_locked() will be called. This call schedules report_work and lm90_report_alarms(), which passes the still-NULL data->hwmon_dev to hwmon_notify_event() and triggers a NULL pointer dereference. Fix the problem by only scheduling the report and alert workers data->hwmon_dev is set.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 4eed33c7db5c0c573928d28d8a2c003642c679b8 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 70d9a71aa407044d70b50d356b6decf6659c4d56 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 075fce376cf852db9293481edce07c181a9b1f46 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 f0b791a006512a48b6348494cb6960598fa99a58 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 aa9429edf9fc0e90d6f4da19ea4b5495a54ab117 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/075fce376cf852db9293481edce07c181a9b1f46 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aa9429edf9fc0e90d6f4da19ea4b5495a54ab117 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4eed33c7db5c0c573928d28d8a2c003642c679b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f0b791a006512a48b6348494cb6960598fa99a58 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/70d9a71aa407044d70b50d356b6decf6659c4d56 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report