media: atomisp: gc2235: fix UAF and memory leak

Summary

In the Linux kernel, the following vulnerability has been resolved: media: atomisp: gc2235: fix UAF and memory leak gc2235_probe() handles its error paths incorrectly. If media_entity_pads_init() fails, gc2235_remove() is called, which tears down the subdev and frees dev, but then still falls through to atomisp_register_i2c_module(). This results in use-after-free. If atomisp_register_i2c_module() fails, the media entity and control handler are left initialized and dev is leaked. gc2235_remove() unconditionally calls media_entity_cleanup() and v4l2_ctrl_handler_free(), but these are not initialized at every error path in gc2235_probe(). Replace gc2235_remove() calls in the probe error paths with explicit unwind labels that free only the resources initialized at each point of failure, in reverse order of initialization.

Timeline

1. Aug 28, 2026, 6:48 AM UTCCVE published
2. Oct 21, 2026, 12:46 PM UTCRecord last updated

Affected versions

• Linux Linux

  From a49d25364dfb9f8a64037488a39ab1f56c5fa419 · fixed in 51b8dc5163d2ff2bf04019f8bf7e3bd0e75bb654; From ad85094b293e40e7a2f831b0311a389d952ebd5e · fixed in 592a0e78ab08f6373c40912365759d8a066e7711; From ad85094b293e40e7a2f831b0311a389d952ebd5e · fixed in fdbb8e55578b4ab647fa58827a9dd8730d7f4add; From ad85094b293e40e7a2f831b0311a389d952ebd5e · fixed in d57e67ea48e4d095052f2b14d8dd7593621f862f; From ad85094b293e40e7a2f831b0311a389d952ebd5e · fixed in f614bf0a64aa1cb7444d152a96798a6bf1d49e1f; From ad85094b293e40e7a2f831b0311a389d952ebd5e · fixed in 628f763aee0047ff44974388d6f70f75a763026b

• Linux Linux

  4.12, 5.8

• KernelLinux

  From 4.12.0 · fixed in 4.18; From 5.8.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 6