CVE-2026-104115

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.

• https://github.com/illumos/illumos-gate/commit/6a2df4aa5381599179ab6afb3165db81960dee35

• https://github.com/illumos/illumos-gate/commit/6a2df4aa5381599179ab6afb3165db81960dee35
• https://illumos.org/issues/18496
• https://illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-2026-104117-denial-of-service-and-missing-authorization-in-door-servers

• CRITICALCVE-2017-20242
• UNSCOREDCVE-2025-29897
• MEDIUMCVE-2025-71384
• HIGHCVE-2026-100216
• MEDIUMCVE-2026-100745
• HIGHCVE-2026-100908PoC
• MEDIUMCVE-2026-101003PoC
• CRITICALCVE-2026-101037PoC

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