VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

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

Source GCVE Database

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Authoritative record:CVE-2026-93199

Not known to be exploited · fixed in d72a5e9060030a1c205b54157c15a428b741d83f : update Linux kernel when convenient.

Data as of 30 Oct 2026, 18:03 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in d72a5e9060030a1c205b54157c15a428b741d83f, d0cc00957292e353ad46039034cd8f82fc4f8057, 3728d90ec66d4ad33d357e7d6e82b02d34e1c99c +5

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-c82m-2rvg-fqpm

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < d72a5e9060030a1c205b54157c15a428b741d83f	Fixed in d72a5e9060030a1c205b54157c15a428b741d83f
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < d0cc00957292e353ad46039034cd8f82fc4f8057	Fixed in d0cc00957292e353ad46039034cd8f82fc4f8057
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 3728d90ec66d4ad33d357e7d6e82b02d34e1c99c	Fixed in 3728d90ec66d4ad33d357e7d6e82b02d34e1c99c
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 533faf3d2e67ded0a62b7ba753c0fe993d1dfc26	Fixed in 533faf3d2e67ded0a62b7ba753c0fe993d1dfc26
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 150e71808d3715a0deefbb189c780d03fdbdc735	Fixed in 150e71808d3715a0deefbb189c780d03fdbdc735
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 7b25b755d59077dd9484ba1360b8fe6396e5ccfb	Fixed in 7b25b755d59077dd9484ba1360b8fe6396e5ccfb

AI-suggested

A fix has been implemented in the Linux kernel to exclude the master device from duplicate target detection. Users should apply the updated kernel version containing this fix when available. Patch status is not explicitly confirmed in the input; check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's I3C master device handling was fixed by ensuring the master device is not treated as a duplicate target device. The function i3c_master_search_i3c_dev_duplicate() could mistakenly identify the controller itself as a duplicate device, which is incorrect behavior.

Impact

This flaw could cause incorrect behavior in device enumeration or management by treating the master controller as a duplicate target device. However, no direct exploitation or impact details are provided, and no known exploits in the wild exist.

Summary

The Linux kernel's i3c_master_search_i3c_dev_duplicate() function searches for I3C devices with the same PID on the bus. Previously, this search could incorrectly match the master device (controller) as a duplicate target device, which is not valid since the controller is not a target device. The fix excludes the master device from this duplicate matching logic, ensuring only real duplicate target devices are identified.

References

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