VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-93086: Linux kernel · firmware: arm_scmi: Avoid IDR updates while cleaning channels

Source GCVE Database

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Authoritative record:CVE-2026-93086· Medium

Not known to be exploited · fixed in f50698c617350a6e2064dffd6cff3f391e142f55 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 18:18 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 f50698c617350a6e2064dffd6cff3f391e142f55, c38b1e19485aaa820e52cfe162525a8af67563da, bab26acebe55e8ad3ab545abda72faa7ca28c477 +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.

ghsa-w3xq-cq2m-6h87

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 22f7f35fd71b597a5d916e41d7646be6ee530c86, < f50698c617350a6e2064dffd6cff3f391e142f55	Fixed in f50698c617350a6e2064dffd6cff3f391e142f55
LinuxLinux	Affected ≥ 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1, < c38b1e19485aaa820e52cfe162525a8af67563da	Fixed in c38b1e19485aaa820e52cfe162525a8af67563da
LinuxLinux	Affected ≥ 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1, < bab26acebe55e8ad3ab545abda72faa7ca28c477	Fixed in bab26acebe55e8ad3ab545abda72faa7ca28c477
LinuxLinux	Affected ≥ 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1, < aed24a3c63920539e9de7fbfe7929a2e7c888cd2	Fixed in aed24a3c63920539e9de7fbfe7929a2e7c888cd2
LinuxLinux	Affected ≥ 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1, < 431c6b872ba7fedcc5a3afb0ec3517db4d95d088	Fixed in 431c6b872ba7fedcc5a3afb0ec3517db4d95d088
LinuxLinux	Affected ≥ 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1, < 54e5a4f7d83db4552d963d0785be32d9df680dcd	Fixed in 54e5a4f7d83db4552d963d0785be32d9df680dcd

AI-suggested

A fix has been implemented in the Linux kernel to avoid updating IDRs during iteration in the arm_scmi firmware cleanup path. Users should update to the fixed kernel versions once available. No additional mitigation is indicated.

Description

A vulnerability in the Linux kernel's arm_scmi firmware component involves unsafe updates to IDR (ID Radix) data structures during channel cleanup. The issue arises because the cleanup function removes entries from an IDR while iterating over it, which can invalidate the iterator state and cause unsafe behavior. The fix avoids modifying the IDR during iteration and defers removal to a later destruction call.

References

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