CVE-2026-89887

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: The flaw in the Linux kernel's ov7740 driver involves a use-after-destroy vulnerability, leading to a kernel panic due to incorrect teardown order.
Exploitability: Exploitation requires root privileges and access to the affected device. The vulnerability is not easily exploitable without these conditions.
Blast radius: If exploited, the impact is high, potentially leading to a system crash or denial of service.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 5.19.1 or later.

kerneluse-after-destroyteardown-orderpanic

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov7740: fix use-after-destroy in remove The ov7740_remove() function had a severe teardown order bug where it destroyed the driver's mutex before freeing the V4L2 control handler which relies on that mutex, leading to a use-after-destroy kernel panic. Furthermore, the driver explicitly called v4l2_ctrl_handler_free() and mutex_destroy() sequentially, but then called ov7740_free_controls() which invokes both of them a second time, resulting in a double-free. This patch fixes the issue by unregistering the subdevice first, and relying exclusively on ov7740_free_controls() to safely tear down the mutex and control handler in the correct order.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.