VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720, 50034d8d0f797c3a7a599f750a7d3e792e80dea5, 027679d613ea73b8a00831369ec34eea804ce1bd +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, < feb0ed76601f3c2f91f08688c5a7d8b9d382f720	Fixed in feb0ed76601f3c2f91f08688c5a7d8b9d382f720
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 50034d8d0f797c3a7a599f750a7d3e792e80dea5	Fixed in 50034d8d0f797c3a7a599f750a7d3e792e80dea5
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 027679d613ea73b8a00831369ec34eea804ce1bd	Fixed in 027679d613ea73b8a00831369ec34eea804ce1bd
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 23a1c4288a60e253a05a882bd8928ed61beb4a48	Fixed in 23a1c4288a60e253a05a882bd8928ed61beb4a48
LinuxLinux	Affected ≥ 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0, < 4f3145db05fede36b35f8249b8acde5bd5d54864	Fixed in 4f3145db05fede36b35f8249b8acde5bd5d54864
LinuxLinux	Affected =5.0	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix use-after-free of master->this sysfs attribute callbacks for the master controller device dereference master->this. However, master->this is freed in i3c_master_detach_free_devs() before the master device itself is released. As a result, sysfs accesses can dereference a freed master->this pointer, leading to a use-after-free. Keep master->this alive until i3c_masterdev_release(), which is called after the master device and its sysfs state are being torn down. Do not free master->this as part of the normal device detach path. On the error path in i3c_master_set_info(), reset master->this and bus.cur_master to NULL before freeing the allocated device.

References

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