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CVE-2026-93793: wifi: iwlwifi: mvm: validate TX_CMD response layout

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-30

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.

Affected products

• Linux: 3.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4d942dfc13aec393e003ab28ff58db744c26e6eb
• https://git.kernel.org/stable/c/5e871c03506c529d5fe372d099c1ad1465c7bc38
• https://git.kernel.org/stable/c/658b5c00d653cdd72babc86791f6f6711190c740
• https://git.kernel.org/stable/c/8d70881707b47353359df57df12f6de67fdacdd2
• https://git.kernel.org/stable/c/fc14f5fe8a4374ed1088cfbddc1dae4d16c9935b

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