VulnerabilityPublished 23 Dec 2025Updated 30 Oct 2026

CVE-2025-68342: Linux kernel · can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fb0c7c77a7ae3a2c3404b7d0173b8739a754b513 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:33 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

Patch: Available – fixed in fb0c7c77a7ae3a2c3404b7d0173b8739a754b513, ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b, 8376208db9283fbdfaa06c8d80735ac9954fa64a +2

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Dec 2025
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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ d08e973a77d128b25e01a08c34d89593fdf222da, < fb0c7c77a7ae3a2c3404b7d0173b8739a754b513	Fixed in fb0c7c77a7ae3a2c3404b7d0173b8739a754b513
LinuxLinux	Affected ≥ d08e973a77d128b25e01a08c34d89593fdf222da, < ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b	Fixed in ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b
LinuxLinux	Affected ≥ d08e973a77d128b25e01a08c34d89593fdf222da, < 8376208db9283fbdfaa06c8d80735ac9954fa64a	Fixed in 8376208db9283fbdfaa06c8d80735ac9954fa64a
LinuxLinux	Affected ≥ d08e973a77d128b25e01a08c34d89593fdf222da, < 395d988f93861101ec89d0dd9e3b876ae9392a5b	Fixed in 395d988f93861101ec89d0dd9e3b876ae9392a5b
LinuxLinux	Affected ≥ d08e973a77d128b25e01a08c34d89593fdf222da, < 4ffac725154cf6a253f5e6aa0c8946232b6a0af5	Fixed in 4ffac725154cf6a253f5e6aa0c8946232b6a0af5
LinuxLinux	Affected =3.16	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data The URB received in gs_usb_receive_bulk_callback() contains a struct gs_host_frame. The length of the data after the header depends on the gs_host_frame hf::flags and the active device features (e.g. time stamping). Introduce a new function gs_usb_get_minimum_length() and check that we have at least received the required amount of data before accessing it. Only copy the data to that skb that has actually been received. [mkl: rename gs_usb_get_minimum_length() -> +gs_usb_get_minimum_rx_length()]

References

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