CVE-2026-89871

media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure

State: Published
Severity: Not scored
Published: Sep 16, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure

kthread_run() returns an ERR_PTR on failure, not NULL. When start_streaming() fails, data->kthread_vid_cap is left holding this error pointer instead of being cleared.

This causes two subsequent bugs: 1. A future call to start_streaming() sees a non-NULL kthread_vid_cap and returns 0 (success) immediately, without actually starting the capture thread. 2. A call to stop_streaming() checks 'kthread_vid_cap == NULL' which is false for an error pointer, and proceeds to call kthread_stop() on the error pointer, leading to a kernel crash.

Fix this by resetting kthread_vid_cap to NULL on failure before jumping to the error path.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before db0f4531aa55cfb0171684ebfffe3ff04b79d5a8Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 0fac63cac6689588da530764ccb6ba55ee8e4d8bAffected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 5c35d380bea60503c4fe0986fe1de6a3263282b3Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 3d1b10d81fe54852ed953f4129577b733bbd6907Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 968c5213e34c48d35febdfd09cf3dc58ad039140Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 0e7f2cd72a4f9268ee09a13b13f3339e7cc71557Affected 5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 76e379754ba618989f6215be608d5c04774a611dAffected
LinuxLinux	4.18Affected before 4.18Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.51 through 6.18.Not affected 7.2.5 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before db0f4531aa55cfb0171684ebfffe3ff04b79d5a8Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 0fac63cac6689588da530764ccb6ba55ee8e4d8bAffected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 5c35d380bea60503c4fe0986fe1de6a3263282b3Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 3d1b10d81fe54852ed953f4129577b733bbd6907Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 968c5213e34c48d35febdfd09cf3dc58ad039140Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 0e7f2cd72a4f9268ee09a13b13f3339e7cc71557Affected
5cebaac609744414463d1ecc28fdecd26c1b9bc1 to before 76e379754ba618989f6215be608d5c04774a611dAffected

LinuxLinux

4.18Affected
before 4.18Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.51 through 6.18.*Not affected
7.2.5 through 7.2.*Not affected
7.3 and laterNot affected

References

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