VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-93202: Linux kernel · i3c: master: Fix recursive locking during device registration

Source GCVE Database

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Authoritative record:CVE-2026-93202· Medium

Not known to be exploited · fixed in b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b : update Linux kernel when convenient.

Data as of 30 Oct 2026, 18:03 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 b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b, 6640f778aa3d430e67171f8d17fe4a35bb44b578, 456f832e5fc26fbfd3b8200fd4553eee520cc377 +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-w328-5f65-pqhc

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b	Fixed in b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 6640f778aa3d430e67171f8d17fe4a35bb44b578	Fixed in 6640f778aa3d430e67171f8d17fe4a35bb44b578
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 456f832e5fc26fbfd3b8200fd4553eee520cc377	Fixed in 456f832e5fc26fbfd3b8200fd4553eee520cc377
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 0200dc55e68cc0177b6e60919de415cc96fdd4e1	Fixed in 0200dc55e68cc0177b6e60919de415cc96fdd4e1
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 015fcf330c29803bbf92b719b4889ba74ecbbc71	Fixed in 015fcf330c29803bbf92b719b4889ba74ecbbc71
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c	Fixed in 9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c

AI-suggested

A fix is available that separates device creation from device registration and uses a maintenance lock instead of the normal-use lock during device object population. Systems should apply the updated Linux kernel version containing this fix. No additional mitigation is indicated.

Description

CVE-2026-93202 is a vulnerability in the Linux kernel's i3c master driver involving recursive locking during device registration. The issue occurs because the function i3c_master_register_new_i3c_devs() holds a read lock while registering devices, and device registration can trigger callbacks that attempt to acquire the same lock recursively, causing potential deadlocks. The fix separates device creation from registration and uses a maintenance lock to prevent recursive locking.

References

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