{"id":"CVE-2026-89871","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure\n\nkthread_run() returns an ERR_PTR on failure, not NULL.\nWhen start_streaming() fails, dat…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure\n\nkthread_run() returns an ERR_PTR on failure, not NULL.\nWhen start_streaming() fails, dat…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < db0f4531aa55cfb0171684ebfffe3ff04b79d5a8","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 0fac63cac6689588da530764ccb6ba55ee8e4d8b","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 5c35d380bea60503c4fe0986fe1de6a3263282b3","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 3d1b10d81fe54852ed953f4129577b733bbd6907","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 968c5213e34c48d35febdfd09cf3dc58ad039140","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 0e7f2cd72a4f9268ee09a13b13f3339e7cc71557","Linux >= 5cebaac609744414463d1ecc28fdecd26c1b9bc1 < 76e379754ba618989f6215be608d5c04774a611d","Linux 4.18"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:55.287","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89871","references":[{"url":"https://git.kernel.org/stable/c/0e7f2cd72a4f9268ee09a13b13f3339e7cc71557","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0fac63cac6689588da530764ccb6ba55ee8e4d8b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d1b10d81fe54852ed953f4129577b733bbd6907","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5c35d380bea60503c4fe0986fe1de6a3263282b3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/76e379754ba618989f6215be608d5c04774a611d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/968c5213e34c48d35febdfd09cf3dc58ad039140","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/db0f4531aa55cfb0171684ebfffe3ff04b79d5a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.987Z","epss":0.00211,"epssPercentile":0.11604,"slug":"CVE-2026-89871","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure\n\nkthread_run() returns an ERR_PTR on failure, not NULL.\nWhen start_streaming() fails, data->kthread_vid_cap is left holding\nthis error pointer instead of being cleared.\n\nThis causes two subsequent bugs:\n1. A future call to start_streaming() sees a non-NULL kthread_vid_cap\n   and returns 0 (success) immediately, without actually starting the\n   capture thread.\n2. A call to stop_streaming() checks 'kthread_vid_cap == NULL' which\n   is false for an error pointer, and proceeds to call kthread_stop()\n   on the error pointer, leading to a kernel crash.\n\nFix this by resetting kthread_vid_cap to NULL on failure before\njumping to the error path.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}