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CVE-2026-89887: media: i2c: ov7740: fix use-after-destroy in remove

• 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: 2026-09-16 · updated 2026-10-19

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.

Affected products

• Linux kernel: 4.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09453b467990e8ef8fe09f45a685f9a625248d33
• https://git.kernel.org/stable/c/25e2505866c577db2661e4d431f0907c6ec9a3b4
• https://git.kernel.org/stable/c/5d1b3dea5a44124bab6c14a2d71b977dabed54e7
• https://git.kernel.org/stable/c/7512838a19af0a284a58435292243fad21e57ff1
• https://git.kernel.org/stable/c/81e9765878d3ac8ad18e3a683332b5d6bc3a0e33
• https://git.kernel.org/stable/c/8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5e
• https://git.kernel.org/stable/c/9e4693436c7dcf8584002500ce4b434b79bbf9ed
• https://git.kernel.org/stable/c/af81f35e4f429e769b784754e1aa4d7a922470ac

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