{"id":"CVE-2026-104115","state":"PUBLISHED","title":"Stack buffer overflow in illumos reparsed nfs-basic plugin allows local users to crash the daemon","description":"A stack-based buffer overflow in the illumos reparse point daemon (reparsed) allows a local user to crash the daemon. get_fs_locations() in usr/src/cmd/fs.d/nfs/rp_basic/libnfs_basic.c, part of the nfs-basic reparse plugin, copies the host and path components of a reparse string into a fixed 1024-byte stack buffer without checking their length. The reparsed door at /var/run/reparsed_door is readable by all users and the door server does not check the caller's credentials, so an unprivileged local user can send an nfs-basic request with an overlong host or path component to overflow the buffer. On systems built with stack protection, which is the default, this causes reparsed to abort; repeated requests place the svc:/system/filesystem/reparse service into maintenance. The service is disabled by default. The flaw has existed since 2009 (illumos-gate commit 2f172c55), and affects any illumos distribution prior to illumos-gate commit 6a2df4aa.","publishedAt":"2026-10-09T14:24:52.028Z","updatedAt":"2026-10-15T18:13:25.024Z","severity":{"score":5.4,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","source":"illumos"},"assigner":"illumos","products":["illumos illumos-gate","OmniOS OmniOS"],"affected":[{"vendor":"illumos","product":"illumos-gate","packageName":"service/file-system/nfs","defaultStatus":"unaffected","versions":[{"version":"2f172c55ef76964744bc62b4500ece87f3089b4d","status":"affected","lessThan":"6a2df4aa5381599179ab6afb3165db81960dee35","changes":[{"at":"6a2df4aa5381599179ab6afb3165db81960dee35","status":"unaffected"}],"versionType":"git"}],"platforms":["x86"],"collectionURL":"https://illumos.org","repo":"https://github.com/illumos/illumos-gate","programFiles":["usr/src/cmd/fs.d/nfs/rp_basic/libnfs_basic.c","usr/src/cmd/fs.d/reparsed/reparsed.c"]},{"vendor":"OmniOS","product":"OmniOS","defaultStatus":"affected","versions":[{"version":"any","status":"affected","lessThan":"r151054","versionType":"custom"},{"version":"r151058","status":"affected","lessThan":"r151058w","changes":[{"at":"r151058w","status":"unaffected"}],"versionType":"custom"},{"version":"r151056","status":"affected","lessThan":"r151056aw","changes":[{"at":"r151056aw","status":"unaffected"}],"versionType":"custom"},{"version":"r151054","status":"affected","lessThan":"r151054bw","changes":[{"at":"r151054bw","status":"unaffected"}],"versionType":"custom"}]}],"references":["https://illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-2026-104117-denial-of-service-and-missing-authorization-in-door-servers","https://illumos.org/issues/18496","https://github.com/illumos/illumos-gate/commit/6a2df4aa5381599179ab6afb3165db81960dee35"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104115.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104115","state":"PUBLISHED","datePublished":"2026-10-09T14:24:52.028Z","dateUpdated":"2026-10-15T18:13:25.024Z","assignerShortName":"illumos","assignerOrgId":"0ca53633-f0b5-4853-ba72-e0a2e62000d0","dateReserved":"2026-10-01T18:07:53.956Z"},"containers":{"cna":{"title":"Stack buffer overflow in illumos reparsed nfs-basic plugin allows local users to crash the daemon","descriptions":[{"lang":"en","value":"A stack-based buffer overflow in the illumos reparse point daemon (reparsed) allows a local user to crash the daemon. get_fs_locations() in usr/src/cmd/fs.d/nfs/rp_basic/libnfs_basic.c, part of the nfs-basic reparse plugin, copies the host and path components of a reparse string into a fixed 1024-byte stack buffer without checking their length. The reparsed door at /var/run/reparsed_door is readable by all users and the door server does not check the caller's credentials, so an unprivileged local user can send an nfs-basic request with an overlong host or path component to overflow the buffer. On systems built with stack protection, which is the default, this causes reparsed to abort; repeated requests place the svc:/system/filesystem/reparse service into maintenance. The service is disabled by default. The flaw has existed since 2009 (illumos-gate commit 2f172c55), and affects any illumos distribution prior to illumos-gate commit 6a2df4aa."}],"affected":[{"vendor":"illumos","product":"illumos-gate","packageName":"service/file-system/nfs","defaultStatus":"unaffected","versions":[{"version":"2f172c55ef76964744bc62b4500ece87f3089b4d","status":"affected","lessThan":"6a2df4aa5381599179ab6afb3165db81960dee35","changes":[{"at":"6a2df4aa5381599179ab6afb3165db81960dee35","status":"unaffected"}],"versionType":"git"}],"platforms":["x86"],"collectionURL":"https://illumos.org","repo":"https://github.com/illumos/illumos-gate","programFiles":["usr/src/cmd/fs.d/nfs/rp_basic/libnfs_basic.c","usr/src/cmd/fs.d/reparsed/reparsed.c"]},{"vendor":"OmniOS","product":"OmniOS","defaultStatus":"affected","versions":[{"version":"any","status":"affected","lessThan":"r151054","versionType":"custom"},{"version":"r151058","status":"affected","lessThan":"r151058w","changes":[{"at":"r151058w","status":"unaffected"}],"versionType":"custom"},{"version":"r151056","status":"affected","lessThan":"r151056aw","changes":[{"at":"r151056aw","status":"unaffected"}],"versionType":"custom"},{"version":"r151054","status":"affected","lessThan":"r151054bw","changes":[{"at":"r151054bw","status":"unaffected"}],"versionType":"custom"}]}],"references":[{"url":"https://illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-2026-104117-denial-of-service-and-missing-authorization-in-door-servers","tags":["mailing-list"]},{"url":"https://illumos.org/issues/18496","tags":["issue-tracking"]},{"url":"https://github.com/illumos/illumos-gate/commit/6a2df4aa5381599179ab6afb3165db81960dee35","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.4,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121 Stack-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"illumos","orgId":"0ca53633-f0b5-4853-ba72-e0a2e62000d0","dateUpdated":"2026-10-09T14:24:52.028Z"},"workarounds":[{"lang":"en","value":"The svc:/system/filesystem/reparse service is disabled by default. Systems on which it has not been enabled are not exposed; on others, disabling it removes exposure at the cost of reparse point (NFS referral) resolution.","supportingMedia":[{"type":"text/html","base64":false,"value":"The svc:/system/filesystem/reparse service is disabled by default. Systems on which it has not been enabled are not exposed; on others, disabling it removes exposure at the cost of reparse point (NFS referral) resolution."}]}],"solutions":[{"lang":"en","value":"Update your illumos distribution to one that includes the fix for this issue.","supportingMedia":[{"type":"text/html","base64":false,"value":"Update your illumos distribution to one that includes the fix for this issue."}]}],"credits":[{"lang":"en","value":"Robert French","type":"finder"},{"lang":"en","value":"James Wynne III","type":"finder"},{"lang":"en","value":"Andy Fiddaman","type":"remediation developer"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"hand-authored"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T18:12:53.428116Z","id":"CVE-2026-104115","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-15T18:13:25.024Z"}}]}}}