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CVE-2026-98325

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

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 7% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in420fcc2fdeae6ecd682d2b1605a0a54c88aed4aaAlso 36e6f0a5e6d7238f4023e77f423c1c1414374309, 0fb37d2b6cb829cebdaea80f39011469f474bdcc and 3 moreCVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 420fcc2fdeae6ecd682d2b1605a0a54c88aed4aaLinuxCVE List
  • 36e6f0a5e6d7238f4023e77f423c1c1414374309LinuxCVE List
  • 0fb37d2b6cb829cebdaea80f39011469f474bdccLinuxCVE List
  • 03d67414bd05b86029afc14535238a9393eac1c6LinuxCVE List
  • 50d3d79dc0743b616afb00d01a626c76758721f7LinuxCVE List
  • 3.7LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 16

  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before df711e9fa20d7e996711c7f43a11a71805bef78dCVE List
  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before 420fcc2fdeae6ecd682d2b1605a0a54c88aed4aaCVE List
  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before 36e6f0a5e6d7238f4023e77f423c1c1414374309CVE List
  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before 0fb37d2b6cb829cebdaea80f39011469f474bdccCVE List
  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before 03d67414bd05b86029afc14535238a9393eac1c6CVE List
  • Linuxaffected: c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 before 50d3d79dc0743b616afb00d01a626c76758721f7CVE List
  • Linuxaffected: fd39be7ff6f81f2dc91ba6e5f87944abef5b4802CVE List
  • Linuxaffected: 3.6.3 before 3.7CVE List
  • Linuxaffected: 3.7CVE List
  • Linuxunaffected: all versions before 3.7CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 6