VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-92506: Linux kernel · firmware: arm_scmi: Fix requested device removal race

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in c3d4ef1c0ca6917aad6f1093b49f3932944a8c19 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c3d4ef1c0ca6917aad6f1093b49f3932944a8c19, 21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3, 2ff7713b7308cd6bea3328f7cd750b5eaab42af3 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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 ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < c3d4ef1c0ca6917aad6f1093b49f3932944a8c19	Fixed in c3d4ef1c0ca6917aad6f1093b49f3932944a8c19
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3	Fixed in 21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 2ff7713b7308cd6bea3328f7cd750b5eaab42af3	Fixed in 2ff7713b7308cd6bea3328f7cd750b5eaab42af3
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 2c4097e6c4aed276c5e9ec2ab331ab397ea780bf	Fixed in 2c4097e6c4aed276c5e9ec2ab331ab397ea780bf
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 1c35915eaaa81a12340c838c5c2ccb02be2194c3	Fixed in 1c35915eaaa81a12340c838c5c2ccb02be2194c3
LinuxLinux	Affected =6.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix requested device removal race scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while notifying listeners but continues to retain the per-protocol list head. When two SCMI drivers for the same protocol unregister concurrently, one thread can remove the final request and free the list head while the other is running its notifier. The latter then dereferences the freed list head after reacquiring the mutex and can free it a second time. Complete the list and IDR updates, including freeing an empty list head, before dropping the mutex. Keep the blocking notifier outside the critical section and retain only the detached request across the callback.

References

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