Out-of-bounds read in Linux kernel - CVE-2026-98186

Vulnerability details

The vulnerability allows a remote attacker to read beyond the bounds of a kernel beacon buffer.

The vulnerability exists due to an out-of-bounds read in mwifiex_search_oui_in_ie() when processing RSN or WPA information elements in beacon or probe-response frames during scan-result parsing. A remote attacker can transmit a crafted information element with a pairwise-cipher count exceeding the element's available length to read beyond the bounds of a kernel beacon buffer.

Affected software

How to mitigate CVE-2026-98186

External References

• https://git.kernel.org/stable/c/2402c9e2644b7e10c7aaaf87bf12743d7e363559
• https://git.kernel.org/stable/c/46cda9d42f0d6ec3057d878ddb1f38c0ab9f51df
• https://git.kernel.org/stable/c/54a9cc5bd70b0d77a5069d4c46998c679a10c857
• https://git.kernel.org/stable/c/58767b41f87244eebaa5a475b9d276c83b89b933
• https://git.kernel.org/stable/c/77e642af7f2f6029e12a35c847c56cbd0466e799
• https://git.kernel.org/stable/c/8bbef2b1ebfbadc0b9c37bbbf9c9e26fe2e41960
• https://git.kernel.org/stable/c/982b8fcdbb28f63bbbf02f0822c0bbda12ec27ed
• https://git.kernel.org/stable/c/e667aee1c192d67d27c803007bfa9c6e0873e959

Related Security Bulletins

• Out-of-bounds read in Linux kernel marvell mwifiex driver
• Debian update for linux