{"id":"CVE-2026-89522","title":"media: staging/ipu7: fix async notifier UAF on probe error path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: staging/ipu7: fix async notifier UAF on probe error path\n\nisys_register_devices() registers the V4L2 async notifier via\nisys_notifier_init(). If a subsequent pro…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81","Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < 323c411fb63122e8cef5b833032d69d59a838559","Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < d7f48aa7d60c65d3e6d5312c27f17d5525a245fb","Linux 6.17"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:48:13.544Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89522","references":[{"url":"https://git.kernel.org/stable/c/2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81"},{"url":"https://git.kernel.org/stable/c/323c411fb63122e8cef5b833032d69d59a838559"},{"url":"https://git.kernel.org/stable/c/d7f48aa7d60c65d3e6d5312c27f17d5525a245fb"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89522.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89522"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532511"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89522"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89522"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89522.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00168,"epssPercentile":0.06142,"scores":{"cna":7.8,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89522","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: staging/ipu7: fix async notifier UAF on probe error path\n\nisys_register_devices() registers the V4L2 async notifier via\nisys_notifier_init(). If a subsequent probe step such as\nisys_fw_log_init() fails, isys_probe() jumps to the out_cleanup label\nwhich only calls isys_unregister_devices(). That helper tears down the\nvideo devices, subdevices, V4L2 device and media device, but never\nunregisters or cleans up the async notifier.\n\nAs a result the notifier stays chained in the global notifier_list while\nthe enclosing struct ipu7_isys is freed by devres, leading to list\ncorruption and a use-after-free the next time the list is walked.\n\nThe remove path already does the right thing by calling\nisys_notifier_cleanup() before isys_unregister_devices(). Mirror that on\nthe probe error path so the notifier is unregistered and cleaned up\nbefore the device is torn down.\n\n## Affected\n\n- `Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81`\n- `Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < 323c411fb63122e8cef5b833032d69d59a838559`\n- `Linux >= a516d36bdc3d8373f904af57c95e76d6f921cf1c < d7f48aa7d60c65d3e6d5312c27f17d5525a245fb`\n- `Linux 6.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89522.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224719,"id":"CVE-2026-89522","ts":1792401499478,"field":"cvss","old":"5.5","new":"7.8"},{"seq":224718,"id":"CVE-2026-89522","ts":1792401499478,"field":"severity","old":"medium","new":"high"},{"seq":203940,"id":"CVE-2026-89522","ts":1789490230676,"field":"cvss","old":"4.1","new":"5.5"},{"seq":202891,"id":"CVE-2026-89522","ts":1789403732830,"field":"cvss","old":"7.8","new":"4.1"},{"seq":202890,"id":"CVE-2026-89522","ts":1789403732830,"field":"severity","old":"high","new":"medium"},{"seq":197975,"id":"CVE-2026-89522","ts":1789384321217,"field":"cvss","old":"4.1","new":"7.8"},{"seq":197974,"id":"CVE-2026-89522","ts":1789384321217,"field":"severity","old":"medium","new":"high"},{"seq":183492,"id":"CVE-2026-89522","ts":1789356675592,"field":"cvss","old":"7.8","new":"4.1"},{"seq":183491,"id":"CVE-2026-89522","ts":1789356675592,"field":"severity","old":"high","new":"medium"},{"seq":153312,"id":"CVE-2026-89522","ts":1789285349998,"field":"cvss","old":null,"new":"7.8"},{"seq":153311,"id":"CVE-2026-89522","ts":1789285349998,"field":"severity","old":"none","new":"high"},{"seq":147077,"id":"CVE-2026-89522","ts":1789270195071,"field":"cvss","old":null,"new":"4.1"},{"seq":147076,"id":"CVE-2026-89522","ts":1789270195071,"field":"severity","old":"none","new":"medium"}]}