Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: set up the TX info early to fix failure paths The previous commit 2c51457d930f ("wifi: mac80211: free ack status frame on TX header build failure") cleaned up the leak, but still left the code a bit messy and the failed SKB didn't get reported to userspace. Fix this up by initialising skb->cb[] earlier, which allows using ieee80211_free_txskb() and therefore reports it for the failure in ieee80211_build_hdr(), and unifies the ieee80211_skb_resize() failure path with it.

[ 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/03d67414bd05b86029afc14535238a9393eac1c6
• git.kernel.org/stable/c/0fb37d2b6cb829cebdaea80f39011469f474bdcc
• git.kernel.org/stable/c/36e6f0a5e6d7238f4023e77f423c1c1414374309
• git.kernel.org/stable/c/420fcc2fdeae6ecd682d2b1605a0a54c88aed4aa
• git.kernel.org/stable/c/50d3d79dc0743b616afb00d01a626c76758721f7
• git.kernel.org/stable/c/df711e9fa20d7e996711c7f43a11a71805bef78d