VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-93199: Linux kernel · i3c: master: Do not treat master device as a duplicate target

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d0cc00957292e353ad46039034cd8f82fc4f8057 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:30 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d0cc00957292e353ad46039034cd8f82fc4f8057, 533faf3d2e67ded0a62b7ba753c0fe993d1dfc26, 150e71808d3715a0deefbb189c780d03fdbdc735 +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 ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < d0cc00957292e353ad46039034cd8f82fc4f8057	Fixed in d0cc00957292e353ad46039034cd8f82fc4f8057
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 533faf3d2e67ded0a62b7ba753c0fe993d1dfc26	Fixed in 533faf3d2e67ded0a62b7ba753c0fe993d1dfc26
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 150e71808d3715a0deefbb189c780d03fdbdc735	Fixed in 150e71808d3715a0deefbb189c780d03fdbdc735
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 7b25b755d59077dd9484ba1360b8fe6396e5ccfb	Fixed in 7b25b755d59077dd9484ba1360b8fe6396e5ccfb
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 4dc1b3eeba7991905a5b5b8129ebea51be7d87b7	Fixed in 4dc1b3eeba7991905a5b5b8129ebea51be7d87b7
LinuxLinux	Affected =5.0	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: i3c: master: Do not treat master device as a duplicate target i3c_master_search_i3c_dev_duplicate() searches the bus for another I3C device with the same PID as the reference device. The search can match master->this, causing the controller itself to be returned as a duplicate. Since the controller is not a target device, it cannot be a duplicate of one. Exclude master->this from matching so that the function only returns real duplicate target devices.

References

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