{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93097","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-17T16:02:15.084Z","datePublished":"2026-09-17T16:11:11.025Z","dateUpdated":"2026-09-17T16:11:11.025Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:11:11.025Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cxl/core/mbox.c"],"versions":[{"version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","lessThan":"86771c105293ca26bfcc320b4f60d32c137b54aa","status":"affected","versionType":"git"},{"version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","lessThan":"42eab80981f4d2ac820e253e80ecf92f8cd91f69","status":"affected","versionType":"git"},{"version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","lessThan":"6ad491cef1a812cf7b53aa769cd8869516c47362","status":"affected","versionType":"git"},{"version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","lessThan":"e77594e0cea67ab1c2317a27aa77a744e26ad6a6","status":"affected","versionType":"git"},{"version":"ed83f7ca398b3798b82c1d5d1113011c0e5a2198","lessThan":"8b301c4afbce4bc3f94528441d8d5ce1366504ad","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cxl/core/mbox.c"],"versions":[{"version":"6.4","status":"affected"},{"version":"0","lessThan":"6.4","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.3-rc1"}]}]}],"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"}}}}