VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-92490: Linux kernel · firmware: arm_scmi: Unrequest devices if driver registration fails

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in a76b20b1f03099204db29b90e1024fe1c2b2cdd7 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 13:04 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in a76b20b1f03099204db29b90e1024fe1c2b2cdd7, 4520d4a1db37198756ad23568e36cdf091b6ffff, 524e57035af2d32498af9dd8fa6fdc92fcc8f80a +3

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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, < a76b20b1f03099204db29b90e1024fe1c2b2cdd7	Fixed in a76b20b1f03099204db29b90e1024fe1c2b2cdd7
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 4520d4a1db37198756ad23568e36cdf091b6ffff	Fixed in 4520d4a1db37198756ad23568e36cdf091b6ffff
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 524e57035af2d32498af9dd8fa6fdc92fcc8f80a	Fixed in 524e57035af2d32498af9dd8fa6fdc92fcc8f80a
LinuxLinux	Affected ≥ a6fe96b2e371d5fd300cca24459cdcf471c2c741, < 35a36fbbc985135f0d35a89d7f9d035ffc499d6e	Fixed in 35a36fbbc985135f0d35a89d7f9d035ffc499d6e
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 9f7cd6a62aa754ed6b48cbd5d50de40add1bcc86	Fixed in 9f7cd6a62aa754ed6b48cbd5d50de40add1bcc86
LinuxLinux	Affected ≥ d3cd7c525fd2ecce3a6c963f314969a54783d211, < 06e65e07a1bcb39a1ebc8bb89a981f8e07900497	Fixed in 06e65e07a1bcb39a1ebc8bb89a981f8e07900497

AI-suggested

This issue has been fixed in the Linux kernel. Users should update to the fixed versions identified by the commit hashes provided. No additional mitigation is required beyond applying the official fix.

Description

A vulnerability in the Linux kernel's arm_scmi firmware component was fixed by ensuring that protocol devices are unrequested if driver registration fails. Previously, if driver registration failed after requesting protocol devices, stale pointers could remain, potentially leading to use-after-free issues.

Impact

The vulnerability could lead to dereferencing stale pointers in the Linux kernel, which may cause kernel crashes or undefined behavior. No known exploits in the wild have been reported. The impact is limited to kernel stability and potential denial of service but no explicit privilege escalation or code execution is described.

Summary

The Linux kernel's arm_scmi driver_register() function requests protocol devices before completing driver registration. If driver_register() fails, the requested devices remain in a global IDR with pointers to the module's ID table. When the failed module unloads, these pointers become stale, and subsequent SCMI device creation or request matching can dereference these invalid pointers. The fix unrequests the entire protocol table before returning from a failed registration, preventing stale pointer dereferences.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 12:51 UTC

Technical details

References

Community reviews

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