VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-93200: Linux kernel · i3c: master: Fix use-after-free of master->this

Source GCVE Database

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Authoritative record:CVE-2026-93200· High

Not known to be exploited · fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720 : patch Linux kernel soon.

Data as of 30 Oct 2026, 18:03 UTC

Severity

High

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

Thin evidence

One scorer or none

Patch: Available – fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720, e766605a0490723df7b61e6abd0c392889732dd7, a9b9cae0bd887ef0d438887f20b0a417491e45f0 +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-353r-jvg2-63v3

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < feb0ed76601f3c2f91f08688c5a7d8b9d382f720	Fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < e766605a0490723df7b61e6abd0c392889732dd7	Fixed in e766605a0490723df7b61e6abd0c392889732dd7
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < a9b9cae0bd887ef0d438887f20b0a417491e45f0	Fixed in a9b9cae0bd887ef0d438887f20b0a417491e45f0
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 50034d8d0f797c3a7a599f750a7d3e792e80dea5	Fixed in 50034d8d0f797c3a7a599f750a7d3e792e80dea5
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 027679d613ea73b8a00831369ec34eea804ce1bd	Fixed in 027679d613ea73b8a00831369ec34eea804ce1bd
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 94af669037d129914828a851d8b2a79b4537b73f	Fixed in 94af669037d129914828a851d8b2a79b4537b73f

AI-suggested

A fix has been implemented that keeps the master->this pointer valid until the device release phase and resets pointers on error paths. Users should apply the official Linux kernel updates that include this fix. Since this is a kernel vulnerability, updating to the patched kernel version is the recommended mitigation.

Description

CVE-2026-93200 is a use-after-free vulnerability in the Linux kernel's i3c master controller device. The issue arises because the sysfs attribute callbacks dereference a pointer (master->this) that is freed prematurely during device detach, leading to potential invalid memory access. The fix involves keeping the master->this pointer alive until the device release phase and properly resetting pointers on error paths.

References

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