VulnerabilityPublished 27 May 2026Updated 6 Nov 2026

CVE-2026-46103: Linux kernel · can: ucan: fix devres lifetime

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fed4626501c871890da287bec62a96e52da1af89 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in fed4626501c871890da287bec62a96e52da1af89, cb2e41e87a2893345859440017e7178bf7a4c70d, c524c124e3094d2de12235a513854c03d06a2b58 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 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 6 Nov 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < fed4626501c871890da287bec62a96e52da1af89	Fixed in fed4626501c871890da287bec62a96e52da1af89
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < cb2e41e87a2893345859440017e7178bf7a4c70d	Fixed in cb2e41e87a2893345859440017e7178bf7a4c70d
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < c524c124e3094d2de12235a513854c03d06a2b58	Fixed in c524c124e3094d2de12235a513854c03d06a2b58
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < c0d3ccc6929e4509076df8f30a4fb1dc5018b0ae	Fixed in c0d3ccc6929e4509076df8f30a4fb1dc5018b0ae
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < a90f0815aaa9c629ac4750e7c71c357dd7f231d7	Fixed in a90f0815aaa9c629ac4750e7c71c357dd7f231d7
LinuxLinux	Affected ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < 10b7b676b78a7bd888d19729b459aad7fc1f428b	Fixed in 10b7b676b78a7bd888d19729b459aad7fc1f428b

Description

In the Linux kernel, the following vulnerability has been resolved: can: ucan: fix devres lifetime USB drivers bind to USB interfaces and any device managed resources should have their lifetime tied to the interface rather than parent USB device. This avoids issues like memory leaks when drivers are unbound without their devices being physically disconnected (e.g. on probe deferral or configuration changes). Fix the control message buffer lifetime so that it is released on driver unbind.

References

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