Integer underflow in Linux kernel - CVE-2026-98185
Published: October 7, 2026
Vulnerability identifier: #VU153832
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98185
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger out-of-bounds reads.
The vulnerability exists due to integer underflow in mwifiex_ret_802_11_scan() when processing firmware-provided scan responses. A local user can supply a short response or a response with an oversized BSS length to trigger out-of-bounds reads.
The affected processing handles both normal and background scan responses.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98185
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/25217c5f6ce0bf3004f80c129464cd35fe9a420f
- https://git.kernel.org/stable/c/3687d7d48070838cc2953431b3a27717cab0aaf6
- https://git.kernel.org/stable/c/48312f0085aa1577d6d41af2a079b34de17c1a57
- https://git.kernel.org/stable/c/7106ad8b74f50cca1ef36131f327d2c78f556daa
- https://git.kernel.org/stable/c/9cff2f39ed38a32070b08364c4c9346e85b8f9ec
- https://git.kernel.org/stable/c/c4943323fda22ef27bb6479b9d328ae48c63f64c
- https://git.kernel.org/stable/c/cb0008480ed7d5cf76f3ad9668a91bbb7d0b4417
- https://git.kernel.org/stable/c/dccf5ecaad4d8d43c545921f20328e8f91af8698