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Vulnerability · Published Oct 9, 2026 · Assigned by illumos

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

Medium 5.4

In plain English

A medium-severity stack buffer overflow in illumos-gate from illumos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 4.0)5.4Medium
Exploit odds (30 days)0.1%top 96.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
illumos illumos-gate 2f172c55ef76964744bc62b4500ece87f3089b4d – before 6a2df4aa5381599179ab6afb3165db81960dee35
OmniOS OmniOS any – before r151054r151058 – before r151058wr151056 – before r151056awr151054 – before r151054bw

Weakness: CWE-121 · 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

References