can: ems_usb: validate CPC message lengths
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 5 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00177 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.271, 5.15.216, 6.1.183 +5Red Hat: 5 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.32 and later | 5.10.271, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.32 and later Fixed in 5.10.271, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74460
- 2026-10-03 Alias added: GHSA-596r-rcx5-45wx
- 2026-10-03 Fix available: Linux/Linux@1c380a332e342b7d58c86c4f556cb0823b16a9b8, Linux/[email protected] · CNA
- 2026-10-03 1 new reference · CNA
- 2026-11-06 CISA SSVC decision points changed
References
Other 8
- https://git.kernel.org/stable/c/1c380a332e342b7d58c86c4f556cb0823b16a9b8
- https://git.kernel.org/stable/c/bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6
- https://git.kernel.org/stable/c/db5655287d78f00daf98888a520bb8da4d30126d
- https://git.kernel.org/stable/c/ce8125566b1d0b0f16449407e014addf451804ea
- https://git.kernel.org/stable/c/0b9090717c7e2184e2c427bbcc752f295116ac1d
- https://git.kernel.org/stable/c/0b23144c59c126beb4a7761a85a194ae0fe668a5
- https://git.kernel.org/stable/c/df3ac2a672a5284441f120d486acabdd6740fc2a
- https://git.kernel.org/stable/c/02925f51377f2a42a6724f00549167499c9302e5
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Sources
- CVE-2026-74460 · CVE Program
- CVE-2026-74460 · NVD
- FIRST EPSS
- GHSA-596r-rcx5-45wx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74460 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences