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CVE-2026-93793

Linux: wifi: iwlwifi: mvm: validate TX_CMD response layout

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 14% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5e871c03506c529d5fe372d099c1ad1465c7bc38Also 4d942dfc13aec393e003ab28ff58db744c26e6eb, 8d70881707b47353359df57df12f6de67fdacdd2CVE List
Published24 Sep 2026Updated 21 Oct 2026CVE List

What fixes it

  • 5e871c03506c529d5fe372d099c1ad1465c7bc38LinuxCVE List
  • 4d942dfc13aec393e003ab28ff58db744c26e6ebLinuxCVE List
  • 8d70881707b47353359df57df12f6de67fdacdd2LinuxCVE 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: iwlwifi: mvm: validate TX_CMD response layout

TX_CMD parsing uses frame_count to walk status entries and then read the trailing SCD SSN. Make the minimum-length check follow that exact runtime layout calculation before parsing the payload.

For new TX API, reject TX_CMD responses with frame_count != 1 and warn/return in the aggregation handler to document that aggregated accounting is expected via BA notifications.

Text from CVE List

Affected versions 10

  • Linuxaffected: 8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c before 5e871c03506c529d5fe372d099c1ad1465c7bc38CVE List
  • Linuxaffected: 8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c before fc14f5fe8a4374ed1088cfbddc1dae4d16c9935bCVE List
  • Linuxaffected: 8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c before 4d942dfc13aec393e003ab28ff58db744c26e6ebCVE List
  • Linuxaffected: 8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c before 8d70881707b47353359df57df12f6de67fdacdd2CVE List
  • Linuxaffected: 3.9CVE List
  • Linuxunaffected: all versions before 3.9CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 4