CVE-2024-39464: media: v4l: async: Fix notifier list entry init

Severity: medium (CVSS 5.5 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: 2024-06-25 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: media: v4l: async: Fix notifier list entry init struct v4l2_async_notifier has several list_head members, but only waiting_list and done_list are initialized. notifier_entry was kept 'zeroed' leading to an uninitialized list_head. This results in a NULL-pointer dereference if csi2_async_register() fails, e.g. node for remote endpoint is disabled, and returns -ENOTCONN. The following calls to v4l2_async_nf_unregister() results in a NULL pointer dereference. Add the missing list head initializer.

Affected products

Linux kernel: from 6.6 before 6.6.34; from 6.7 before 6.9.5 — fixed in 6.6.34, 6.9.5

How to fix

Upgrade to a fixed version: Linux kernel 6.6.34, 6.9.5. Check the vendor advisory for mitigations.

References

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