CVE-2024-40929: wifi: iwlwifi: mvm: check n_ssids before accessing the ssids

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-12 · updated 2026-08-04
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: check n_ssids before accessing the ssids In some versions of cfg80211, the ssids poinet might be a valid one even though n_ssids is 0. Accessing the pointer in this case will cuase an out-of-bound access. Fix this by checking n_ssids first.

Affected products

Linux kernel: from 4.17 before 5.10.221; from 5.11 before 5.15.162; from 5.16 before 6.1.95; from 6.2 before 6.6.35; from 6.7 before 6.9.6; 6.10-rc1, 6.10-rc2 — fixed in 5.10.221, 5.15.162, 6.1.95, 6.6.35, 6.9.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.221, 5.15.162, 6.1.95, 6.6.35. Check the vendor advisory for mitigations.

References

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