Heap-based buffer overflow in Linux kernel - CVE-2026-53195
Published: June 26, 2026
Vulnerability identifier: #VU135601
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53195
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in build_i2c_fw_hdr() in the io_ti USB serial driver when parsing a crafted firmware file. A local user can supply a firmware image with an oversized Length field to cause a denial of service.
The issue arises because the Length field from the firmware image is not validated against the available destination buffer space before copying.
How to mitigate CVE-2026-53195
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae
- https://git.kernel.org/stable/c/130d6567eb148040eed1b73e1414ad6c27d22bd5
- https://git.kernel.org/stable/c/294692d3296eee3391c348d7ea6401916d27806c
- https://git.kernel.org/stable/c/2fd64bf0ad66ab5de0c73524591d879427ba5aba
- https://git.kernel.org/stable/c/3e187152f44d76d7633a3855ffd0099e1588b82a
- https://git.kernel.org/stable/c/4cb722747ed25971f35cc47ce5c0e79d7f717713
- https://git.kernel.org/stable/c/5a79b634ee58786ca627268daefa7744f2af2e14
- https://git.kernel.org/stable/c/b7faf660eefa2047ebc2959ff76da2b6eae2e9e3