Out-of-bounds read in Linux kernel - CVE-2026-64549
Published: July 28, 2026
Vulnerability identifier: #VU139820
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64549
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in bpa10x_setup() when processing a crafted device response to the vendor command. An attacker with physical access can return a one-byte or unterminated response to disclose sensitive information.
The out-of-bounds data may be exposed through the kernel log and the firmware-info debugfs file.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-64549
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.100-1
linux (Debian package) - update to 6.12.100-1
External References
- https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c
- https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0
- https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2
- https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5
- https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b
- https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5
- https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903
- https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793