Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: reject TKIP frames without a full MIC libipw_michael_mic_verify() assumes that an skb contains an eight-byte Michael MIC. A short TKIP frame makes the unsigned payload length wrap, causing michael_mic() to read past the skb. Check that the MIC is present before verifying it, and use the existing MICHAEL_MIC_LEN constant for all MIC lengths in the verifier.

[ 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/06f42accaf3c6aecab1dcc57f68dde6c06c8b380
• git.kernel.org/stable/c/9a7fb67364817710c96785ff86b71a2711ee92cb
• git.kernel.org/stable/c/ac7c08626f67844336086cf563f417566b76f0d7
• git.kernel.org/stable/c/bb7ae8910cc886885aea95abb7c2e578a2341646
• git.kernel.org/stable/c/f448b267968d0ee985e5927c868c8f858169ab34