{"id":"CVE-2026-93097","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mbox: Break poison list loop on an empty payload\n\nA device that returns count == 0 with CXL_POISON_FLAG_MORE set on every\niteration never advances nr_records, so th…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mbox: Break poison list loop on an empty payload\n\nA device that returns count == 0 with CXL_POISON_FLAG_MORE set on every\niteration never advances nr_records, so th…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= ed83f7ca398b3798b82c1d5d1113011c0e5a2198 < 86771c105293ca26bfcc320b4f60d32c137b54aa","Linux >= ed83f7ca398b3798b82c1d5d1113011c0e5a2198 < 42eab80981f4d2ac820e253e80ecf92f8cd91f69","Linux >= ed83f7ca398b3798b82c1d5d1113011c0e5a2198 < 6ad491cef1a812cf7b53aa769cd8869516c47362","Linux >= ed83f7ca398b3798b82c1d5d1113011c0e5a2198 < e77594e0cea67ab1c2317a27aa77a744e26ad6a6","Linux >= ed83f7ca398b3798b82c1d5d1113011c0e5a2198 < 8b301c4afbce4bc3f94528441d8d5ce1366504ad","Linux 6.4"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:03.843","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93097","references":[{"url":"https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.758Z","epss":0.002,"epssPercentile":0.10106,"slug":"CVE-2026-93097","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mbox: Break poison list loop on an empty payload\n\nA device that returns count == 0 with CXL_POISON_FLAG_MORE set on every\niteration never advances nr_records, so the max_errors guard never\ntrips and the do/while loops forever while holding poison.mutex. That\nhangs the sysfs-triggered scan thread and blocks all subsequent poison\noperations on the device. The existing \"Protect against an uncleared\n_FLAG_MORE\" guard was intended to bound a misbehaving device but does\nnot cover the count == 0 case.\n\nStop the loop on an empty payload so a malfunctioning or malicious\ndevice cannot wedge the poison scan.\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":[]}