Stack buffer overflow in illumos reparsed nfs-basic plugin allows local users to crash the daemon
Summary
| CVE | CVE-2026-104115 |
|---|---|
| State | PUBLISHED |
| Assigner | illumos |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-09 15:17:07 UTC |
| Updated | 2026-10-09 16:35:35 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 5.4 MEDIUM from 0ca53633-f0b5-4853-ba72-e0a2e62000d0
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based Buffer Overflow
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 | Secondary | 5.4 | MEDIUM | 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/C... |
| 4.0 | CNA | CVSS | 5.4 | MEDIUM | 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 |
CVSS v4.0 Breakdown
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Illumos | Illumos-gate | affected 2f172c55ef76964744bc62b4500ece87f3089b4d 6a2df4aa5381599179ab6afb3165db81960dee35 git | x86 |
| CNA | OmniOS | OmniOS | affected any r151054 custom | Not specified |
| CNA | OmniOS | OmniOS | affected r151058 r151058w custom | Not specified |
| CNA | OmniOS | OmniOS | affected r151056 r151056aw custom | Not specified |
| CNA | OmniOS | OmniOS | affected r151054 r151054bw custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/illumos/illumos-gate/commit/6a2df4aa5381599179ab6afb3165db819... | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 | github.com | |
| illumos.org/issues/18496 | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 | illumos.org | |
| illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-202... | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 | illumos.topicbox.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Robert French (en)
CNA: James Wynne III (en)
CNA: Andy Fiddaman (en)
Additional Advisory Data
Solutions
CNA: Update your illumos distribution to one that includes the fix for this issue.
Workarounds
CNA: 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.