Medium [CVE-2026-89741] Linux kernel (v4l2-dev): Double-free vulnerability due to incorrect error handling
This medium-severity Red Hat Linux advisory covers CVE-2026-89741.
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Summary
A flaw was found in the Linux kernel's media subsystem, specifically within the v4l2-dev component. This vulnerability arises from incorrect error handling in the `__video_register_device()` function.
If a device registration fails, the system attempts to free the same memory region twice, leading to a double-free condition. This type of flaw can result in system instability, memory corruption, or a denial of service (DoS).
Red Hat severity: Moderate — CVSS 5.8 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H). Weakness: CWE-1341.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 46 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 46 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 46 minutes ago·verify at source
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