Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: validate scan response extents mwifiex_ret_802_11_scan() subtracts the fixed response fields and the firmware-provided BSS length from resp->size without first proving that either extent fits. A short response or oversized BSS length can therefore underflow tlv_buf_size and make the TLV parser walk beyond the command response. Compute the fixed extent from the selected normal or background scan response. Validate that the fixed fields and BSS data fit before deriving the TLV extent and entering the parser.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/25217c5f6ce0bf3004f80c129464cd35fe9a420f
• git.kernel.org/stable/c/3687d7d48070838cc2953431b3a27717cab0aaf6
• git.kernel.org/stable/c/48312f0085aa1577d6d41af2a079b34de17c1a57
• git.kernel.org/stable/c/7106ad8b74f50cca1ef36131f327d2c78f556daa
• git.kernel.org/stable/c/9cff2f39ed38a32070b08364c4c9346e85b8f9ec
• git.kernel.org/stable/c/c4943323fda22ef27bb6479b9d328ae48c63f64c
• git.kernel.org/stable/c/cb0008480ed7d5cf76f3ad9668a91bbb7d0b4417
• git.kernel.org/stable/c/dccf5ecaad4d8d43c545921f20328e8f91af8698