SB20260816260 - Out-of-bounds read in Linux kernel can usb driver
Published: August 16, 2026
Security Bulletin ID
SB20260816260
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-74460)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in ems_usb_read_bulk_callback() in the ems_usb CAN USB driver when processing crafted CPC messages in a USB receive buffer. A local attacker can supply a crafted CPC message with an invalid length to cause a denial of service.
Remediation
Install update from vendor's website.
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