CVE-2026-74460

can: ems_usb: validate CPC message lengths

Published Aug 15, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

can: ems_usb: validate CPC message lengths

ems_usb_read_bulk_callback() walks CPC messages packed in one USB
receive buffer.

Check that each declared message fits in the URB payload. Also require the
type-specific payload to cover the fields used by the CAN, state, error and
overrun handlers.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< 1c380a332e342b7d58c86c4f556cb0823b16a9b8
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< db5655287d78f00daf98888a520bb8da4d30126d
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< ce8125566b1d0b0f16449407e014addf451804ea
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< 0b9090717c7e2184e2c427bbcc752f295116ac1d
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< 0b23144c59c126beb4a7761a85a194ae0fe668a5
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< df3ac2a672a5284441f120d486acabdd6740fc2a
`702171adeed3607ee9603ec30ce081411e36ae42`	affected	< 02925f51377f2a42a6724f00549167499c9302e5

Linux

affected

Version	Status	Constraints
`2.6.32`	affected	—
`0`	unaffected	< 2.6.32
`5.10.271`	unaffected	≤ 5.10.*
`5.15.216`	unaffected	≤ 5.15.*
`6.1.183`	unaffected	≤ 6.1.*
`6.6.151`	unaffected	≤ 6.6.*
`6.12.103`	unaffected	≤ 6.12.*
`6.18.44`	unaffected	≤ 6.18.*
`7.1.8`	unaffected	≤ 7.1.*
`7.2`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[702171adeed3607ee9603ec30ce081411e36ae42,ce8125566b1d0b0f16449407e014addf451804ea)`	affected	code_commit	—
`[702171adeed3607ee9603ec30ce081411e36ae42,0b9090717c7e2184e2c427bbcc752f295116ac1d)`	affected	code_commit	—
`[702171adeed3607ee9603ec30ce081411e36ae42,0b23144c59c126beb4a7761a85a194ae0fe668a5)`	affected	code_commit	—
`[702171adeed3607ee9603ec30ce081411e36ae42,df3ac2a672a5284441f120d486acabdd6740fc2a)`	affected	code_commit	—
`[702171adeed3607ee9603ec30ce081411e36ae42,02925f51377f2a42a6724f00549167499c9302e5)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`2.6.32`	affected	semver	—
`[0,2.6.32)`	unaffected	semver	—
`[6.6.151,6.7.0)`	unaffected	semver	—
`[6.12.103,6.13.0)`	unaffected	semver	—
`[6.18.44,6.19.0)`	unaffected	semver	—
`[7.1.8,7.2.0)`	unaffected	semver	—
`[7.2-rc6,*]`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4777-1	linux security update
Debian DLA	DLA-4788-1	linux-6.12 security update
Debian DSA	DSA-6466-1	linux security update
Ubuntu USN	USN-8876-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8875-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8877-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8878-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8879-1	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8875-2	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-9019-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9020-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9022-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9023-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9039-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-9091-1	Linux kernel (NVIDIA Tegra) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.177% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/02925f51377f2a42a6724f00549167499c9302e5
https://git.kernel.org/stable/c/0b23144c59c126beb4a7761a85a194ae0fe668a5
https://git.kernel.org/stable/c/0b9090717c7e2184e2c427bbcc752f295116ac1d
https://git.kernel.org/stable/c/1c380a332e342b7d58c86c4f556cb0823b16a9b8
https://git.kernel.org/stable/c/bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6
https://git.kernel.org/stable/c/ce8125566b1d0b0f16449407e014addf451804ea
https://git.kernel.org/stable/c/db5655287d78f00daf98888a520bb8da4d30126d
https://git.kernel.org/stable/c/df3ac2a672a5284441f120d486acabdd6740fc2a
https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74460-0f76@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-74460
https://www.cve.org/CVERecord?id=CVE-2026-74460

History

Nov 7, 2026 7:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 3, 2026 11:15 AM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/1c380a332e342b7d58c86c4f556cb0823b16a9b8

Aug 20, 2026 12:15 AM Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-130
References		https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74460-0f76@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-74460 https://www.cve.org/CVERecord?id=CVE-2026-74460
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Aug 19, 2026 4:45 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6 https://git.kernel.org/stable/c/db5655287d78f00daf98888a520bb8da4d30126d

Aug 15, 2026 12:45 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: validate CPC message lengths ems_usb_read_bulk_callback() walks CPC messages packed in one USB receive buffer. Check that each declared message fits in the URB payload. Also require the type-specific payload to cover the fields used by the CAN, state, error and overrun handlers.
Title		can: ems_usb: validate CPC message lengths
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/02925f51377f2a42a6724f00549167499c9302e5 https://git.kernel.org/stable/c/0b23144c59c126beb4a7761a85a194ae0fe668a5 https://git.kernel.org/stable/c/0b9090717c7e2184e2c427bbcc752f295116ac1d https://git.kernel.org/stable/c/ce8125566b1d0b0f16449407e014addf451804ea https://git.kernel.org/stable/c/df3ac2a672a5284441f120d486acabdd6740fc2a