Use-after-free in Linux kernel - CVE-2026-98218
Published: October 7, 2026
Vulnerability identifier: #VU153803
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98218
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to prevent reuse of an I2C adapter channel.
The vulnerability exists due to use-after-free in the I2C address translator adapter management code when handling cleanup after an adapter registration failure. A local user can trigger an adapter registration failure that leaves a dangling channel pointer to prevent reuse of an I2C adapter channel.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98218
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84
- https://git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb
- https://git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5
- https://git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef
- https://git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02