CVE-2026-89887

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 9e4693436c7dcf8584002500ce4b434b79bbf9edaffected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 81e9765878d3ac8ad18e3a683332b5d6bc3a0e33affected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5eaffected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 7512838a19af0a284a58435292243fad21e57ff1affected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 25e2505866c577db2661e4d431f0907c6ec9a3b4affected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < af81f35e4f429e769b784754e1aa4d7a922470acaffected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 09453b467990e8ef8fe09f45a685f9a625248d33affected
LinuxLinux39c5c4471b8d793daf868bd004e56ed420e89707 < 5d1b3dea5a44124bab6c14a2d71b977dabed54e7affected
LinuxLinux4.16affected
LinuxLinux0 < 4.16unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References