Out-of-bounds write in Linux kernel - CVE-2026-80931
Published: September 13, 2026
Vulnerability identifier: #VU149469
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80931
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to cause an out-of-bounds write.
The vulnerability exists due to improper bounds checking in w1_f19_i2c_master_transfer() in the DS28E17 1-Wire-to-I2C bridge driver when handling an I2C_M_RECV_LEN read with an oversized device-controlled length. An attacker with physical access can supply an oversized length byte through a downstream I2C device to cause an out-of-bounds write.
Affected software
Linux kernel
How to mitigate CVE-2026-80931
Install security update from vendor's repository.