CVE-2022-48787: iwlwifi: fix use-after-free

Severity: high (CVSS 7.8 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: 2024-07-16 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: iwlwifi: fix use-after-free If no firmware was present at all (or, presumably, all of the firmware files failed to parse), we end up unbinding by calling device_release_driver(), which calls remove(), which then in iwlwifi calls iwl_drv_stop(), freeing the 'drv' struct. However the new code I added will still erroneously access it after it was freed. Set 'failure=false' in this case to avoid the access, all data was already freed anyway.

Affected products

Linux kernel: from 4.14.263 before 4.14.268; from 4.19.226 before 4.19.231; from 5.4.174 before 5.4.181; from 5.10.94 before 5.10.102; from 5.15.17 before 5.15.25; from 5.16.3 before 5.16.11 — fixed in 4.14.268, 4.19.231, 5.10.102, 5.15.25, 5.16.11, 5.4.181

How to fix

Upgrade to a fixed version: Linux kernel 4.14.268, 4.19.231, 5.10.102, 5.15.25. Check the vendor advisory for mitigations.

References

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