{"id":"CVE-2026-93097","summary":"cxl/mbox: Break poison list loop on an empty payload","details":"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 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.","modified":"2026-09-18T03:48:44.147200736Z","published":"2026-09-17T16:11:11.025Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93097.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93097.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93097"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198"},{"fixed":"86771c105293ca26bfcc320b4f60d32c137b54aa"},{"fixed":"42eab80981f4d2ac820e253e80ecf92f8cd91f69"},{"fixed":"6ad491cef1a812cf7b53aa769cd8869516c47362"},{"fixed":"e77594e0cea67ab1c2317a27aa77a744e26ad6a6"},{"fixed":"8b301c4afbce4bc3f94528441d8d5ce1366504ad"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93097.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93097.json"}}],"schema_version":"1.9.0"}