wifi: mac80211: set up the TX info early to fix failure paths

Summary

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.

Timeline

1. Oct 6, 2026, 8:46 AM UTCCVE published
2. Oct 19, 2026, 9:17 AM UTCRecord last updated

Affected versions

• Linux Linux

  From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in df711e9fa20d7e996711c7f43a11a71805bef78d; From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in 420fcc2fdeae6ecd682d2b1605a0a54c88aed4aa; From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in 36e6f0a5e6d7238f4023e77f423c1c1414374309; From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in 0fb37d2b6cb829cebdaea80f39011469f474bdcc; From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in 03d67414bd05b86029afc14535238a9393eac1c6; From c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 · fixed in 50d3d79dc0743b616afb00d01a626c76758721f7; From 3.6.3 · fixed in 3.7

• Linux Linux

  3.7

• KernelLinux

  From 3.7.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.54; From 6.19.0 · fixed in 7.2.8

References 6