{"api_version":"1","generated_at":"2026-09-18T02:28:37+00:00","cve":"CVE-2026-93097","urls":{"html":"https://cve.report/CVE-2026-93097","api":"https://cve.report/api/cve/CVE-2026-93097.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93097","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93097"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:18:03","updated_at":"2026-09-17 17:18:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa","name":"https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad","name":"https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69","name":"https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6","name":"https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362","name":"https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93097","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93097","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed83f7ca398b3798b82c1d5d1113011c0e5a2198 86771c105293ca26bfcc320b4f60d32c137b54aa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed83f7ca398b3798b82c1d5d1113011c0e5a2198 42eab80981f4d2ac820e253e80ecf92f8cd91f69 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed83f7ca398b3798b82c1d5d1113011c0e5a2198 6ad491cef1a812cf7b53aa769cd8869516c47362 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed83f7ca398b3798b82c1d5d1113011c0e5a2198 e77594e0cea67ab1c2317a27aa77a744e26ad6a6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ed83f7ca398b3798b82c1d5d1113011c0e5a2198 8b301c4afbce4bc3f94528441d8d5ce1366504ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"86771c105293ca26bfcc320b4f60d32c137b54aa","status":"affected","version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","versionType":"git"},{"lessThan":"42eab80981f4d2ac820e253e80ecf92f8cd91f69","status":"affected","version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","versionType":"git"},{"lessThan":"6ad491cef1a812cf7b53aa769cd8869516c47362","status":"affected","version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","versionType":"git"},{"lessThan":"e77594e0cea67ab1c2317a27aa77a744e26ad6a6","status":"affected","version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","versionType":"git"},{"lessThan":"8b301c4afbce4bc3f94528441d8d5ce1366504ad","status":"affected","version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cxl/core/mbox.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:11:11.025Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa"},{"url":"https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69"},{"url":"https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362"},{"url":"https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6"},{"url":"https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad"}],"title":"cxl/mbox: Break poison list loop on an empty payload","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93097","datePublished":"2026-09-17T16:11:11.025Z","dateReserved":"2026-09-17T16:02:15.084Z","dateUpdated":"2026-09-17T16:11:11.025Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:18:03","lastModifiedDate":"2026-09-17 17:18:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93097","Ordinal":"1","Title":"cxl/mbox: Break poison list loop on an empty payload","CVE":"CVE-2026-93097","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93097","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"cxl/mbox: Break poison list loop on an empty payload"}]}}}