CVE-2026-74604
Use-after-free in Linux thermal hwmon may allow kernel crash or local privilege escalation.
Is CVE-2026-74604 being exploited?
Not confirmed. CVE-2026-74604 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-74604?
CVE-2026-74604 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74604?
Yes. A fix has been recorded for CVE-2026-74604. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74604 affect?
CVE-2026-74604 affects Linux kernel (thermal hwmon subsystem), Kernels containing commit 030a48b0f6ce. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74604?
Apply upstream kernel fix or vendor updates immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker can trigger a use-after-free in thermal_add_hwmon_sysfs to crash the kernel or potentially achieve kernel-level code execution (privilege escalation).
Patch when possible
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < 2434f4765da8ccd7ef31be88b86f1bfa2e95be11
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < 999e573212d5f1debf073c68be35e55bbfad12fc
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < 6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < 8d34019d1413629a434a7e8d9f91c76d256196a0
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < 6b446d335ba16e93a266dd77adf1ba51abc82df4
- affected>= 030a48b0f6ce393d78b8d33debb1e2043b8cc156 and < ff8da20b6f47c48d46e47f93f7a59e2d56ee9107
- affected5.11
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.