{"id":"CVE-2026-93097","revision":"ae2cf259798e49b485d7535cb7ebe234","records":[{"revision":"ae2cf259798e49b485d7535cb7ebe234","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93097","aliases":[],"title":"cxl/mbox: Break poison list loop on an empty payload","description":"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.","state":0,"publishedAt":"2026-09-17T16:11:11.025+00:00","modifiedAt":"2026-10-19T09:05:30.426+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cxl/core/mbox.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ed83f7ca398b3798b82c1d5d1113011c0e5a2198\",\n                            \"lessThan\": \"86771c105293ca26bfcc320b4f60d32c137b54aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ed83f7ca398b3798b82c1d5d1113011c0e5a2198\",\n                            \"lessThan\": \"42eab80981f4d2ac820e253e80ecf92f8cd91f69\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ed83f7ca398b3798b82c1d5d1113011c0e5a2198\",\n                            \"lessThan\": \"6ad491cef1a812cf7b53aa769cd8869516c47362\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ed83f7ca398b3798b82c1d5d1113011c0e5a2198\",\n                            \"lessThan\": \"e77594e0cea67ab1c2317a27aa77a744e26ad6a6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ed83f7ca398b3798b82c1d5d1113011c0e5a2198\",\n                            \"lessThan\": \"8b301c4afbce4bc3f94528441d8d5ce1366504ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cxl/core/mbox.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa","https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69","https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362","https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6","https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93097","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93097","identifiers":["CVE-2026-93097"]},"retained":false,"historicalAffected":[]}],"coverage":[]}