Medium 5.4Published Oct 9, 2026

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

Updated under an hour ago (Oct 28, 2026, 5:50 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: illumos
NVD analysis: Awaiting Analysis
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

illumos illumos-gate illumos:gate (from the name)	from 2f172c55ef76964744bc62b4500ece87f3089b4d before 6a2df4aa5381599179ab6afb3165db81960dee35; fixed at 6a2df4aa5381599179ab6afb3165db81960dee35	CNA record
OmniOS OmniOS omnios:omnios (from the name)	from any before r151054; from r151058 before r151058w; fixed at r151058w; from r151056 before r151056aw; fixed at r151056aw; from r151054 before r151054bw; fixed at r151054bw	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.