VulnerabilityPublished 25 Mar 2026Updated 5 Nov 2026

CVE-2026-23365: Linux kernel · net: usb: kalmia: validate USB endpoints

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ff675bc5b3e8c356f9d993d65d0bae6ed0dc7459 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:49 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, 2026-11-05.

Patch

Available – fixed in ff675bc5b3e8c356f9d993d65d0bae6ed0dc7459, c58b6c29a4c9b8125e8ad3bca0637e00b71e2693, 185050b47df3d41e49f20ad01beea2e7b9cddaa7 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 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 5 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 ≥ d40261236e8e278cb1936cb5e934262971692b10, < ff675bc5b3e8c356f9d993d65d0bae6ed0dc7459	Fixed in ff675bc5b3e8c356f9d993d65d0bae6ed0dc7459
LinuxLinux	Affected ≥ d40261236e8e278cb1936cb5e934262971692b10, < c58b6c29a4c9b8125e8ad3bca0637e00b71e2693	Fixed in c58b6c29a4c9b8125e8ad3bca0637e00b71e2693
LinuxLinux	Affected ≥ d40261236e8e278cb1936cb5e934262971692b10, < 185050b47df3d41e49f20ad01beea2e7b9cddaa7	Fixed in 185050b47df3d41e49f20ad01beea2e7b9cddaa7
LinuxLinux	Affected ≥ d40261236e8e278cb1936cb5e934262971692b10, < 011684cd18349aa4c52167c8ac37a0524169f48c	Fixed in 011684cd18349aa4c52167c8ac37a0524169f48c
LinuxLinux	Affected ≥ d40261236e8e278cb1936cb5e934262971692b10, < 51c20ea5f1555a984c041b0dbf56f00d41b9e652	Fixed in 51c20ea5f1555a984c041b0dbf56f00d41b9e652
LinuxLinux	Affected ≥ d40261236e8e278cb1936cb5e934262971692b10, < 28a380bfa5bc7f6a9380b85e8eab919ee6ac1701	Fixed in 28a380bfa5bc7f6a9380b85e8eab919ee6ac1701

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: kalmia: validate USB endpoints The kalmia driver should validate that the device it is probing has the proper number and types of USB endpoints it is expecting before it binds to it. If a malicious device were to not have the same urbs the driver will crash later on when it blindly accesses these endpoints.

References

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