CVE-2026-89098
Nfs-utils: nfs-utils: denial of service via assertion failure in fsidd
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Nfs-utils: nfs-utils: denial of service via assertion failure in fsidd
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
CVE-2026-89098- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-06
EUVDEUVD-2026-103016
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
EUVD-2026-103016- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-7q29-687q-4m44
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local...
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
GHSA-7q29-687q-4m44- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
NVD
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
CVE-2026-89098- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-06
OSVBELL-CVE-2026-89098
- Record
BELL-CVE-2026-89098- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-89098
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
DEBIAN-CVE-2026-89098- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-89098
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
UBUNTU-CVE-2026-89098- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVAZL-109794 No score
CVE-2026-89098 affecting package nfs-utils for versions less than 2.6.4-5
A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.
- Record
AZL-109794- Updated
- 2026-11-07
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nfs-utilsAzure Linux:3 |
before 2.6.4-5 | 2.6.4-5 |
nfs-utilsAlpaquita:25 |
2.6.4-r4 and later | None known |
nfs-utilsAlpaquita:stream |
2.6.2-r0 and later | None known |
nfs-utilsDebian:12 |
All versions, plus listed versions 1:2.6.2-41:2.6.2-4+deb12u11:2.6.3-11:2.6.3-1~exp11:2.6.3-2 Show 30 moreShow less1:2.6.3-31:2.6.3-4~exp11:2.6.4-11:2.6.4-1~exp11:2.6.4-21:2.6.4-31:2.6.4-41:2.6.4-51:2.6.4-61:2.7.1-11:2.7.1-1~exp11:2.7.1-21:2.7.1-31:2.8.1-11:2.8.1-1~exp11:2.8.1-21:2.8.2-11:2.8.2-21:2.8.2-2~exp11:2.8.2-31:2.8.3-11:2.8.3-1~exp11:2.8.4-11:2.8.4-21:2.8.5-11:2.8.6-11:2.8.7-11:2.9.1-11:2.9.2-11:3.1.1-1 |
None known |
nfs-utilsDebian:13 |
All versions, plus listed versions 1:2.8.3-11:2.8.4-11:2.8.4-21:2.8.5-11:2.8.6-1 Show 4 moreShow less1:2.8.7-11:2.9.1-11:2.9.2-11:3.1.1-1 |
None known |
nfs-utilsDebian:14 |
before 1:3.1.1-1, plus listed versions 1:2.8.3-11:2.8.4-11:2.8.4-21:2.8.5-11:2.8.6-11:2.8.7-11:2.9.1-11:2.9.2-1 |
1:3.1.1-1 |
nfs-utilsUbuntu:14.04:LTS |
All versions, plus listed versions 1:1.2.8-2ubuntu21:1.2.8-4ubuntu11:1.2.8-5ubuntu11:1.2.8-6ubuntu11:1.2.8-6ubuntu1.11:1.2.8-6ubuntu1.2 |
None known |
nfs-utilsUbuntu:16.04:LTS |
All versions, plus listed versions 1:1.2.8-9ubuntu101:1.2.8-9ubuntu111:1.2.8-9ubuntu121:1.2.8-9ubuntu12.11:1.2.8-9ubuntu12.21:1.2.8-9ubuntu12.3 |
None known |
nfs-utilsUbuntu:18.04:LTS |
All versions, plus listed versions 1:1.3.4-2.1ubuntu21:1.3.4-2.1ubuntu41:1.3.4-2.1ubuntu51:1.3.4-2.1ubuntu5.11:1.3.4-2.1ubuntu5.21:1.3.4-2.1ubuntu5.31:1.3.4-2.1ubuntu5.5 |
None known |
nfs-utilsUbuntu:20.04:LTS |
All versions, plus listed versions 1:1.3.4-2.5ubuntu21:1.3.4-2.5ubuntu31:1.3.4-2.5ubuntu3.11:1.3.4-2.5ubuntu3.31:1.3.4-2.5ubuntu3.41:1.3.4-2.5ubuntu3.51:1.3.4-2.5ubuntu3.61:1.3.4-2.5ubuntu3.7 |
None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
nfs-utilsUbuntu:22.04:LTS |
All versions, plus listed versions 1:1.3.4-6ubuntu11:2.6.1-1~exp1ubuntu11:2.6.1-1ubuntu11:2.6.1-1ubuntu1.11:2.6.1-1ubuntu1.2 |
None known |
nfs-utilsUbuntu:24.04:LTS |
All versions, plus listed versions 1:2.6.3-3ubuntu11:2.6.4-3ubuntu31:2.6.4-3ubuntu41:2.6.4-3ubuntu51:2.6.4-3ubuntu5.1 |
None known |
nfs-utilsUbuntu:26.10 |
All versions, plus listed versions 1:2.8.5-1ubuntu11:2.9.1-1ubuntu1 |
None known |
nfs-utilsUbuntu:26.04:LTS |
All versions, plus listed versions 1:2.8.3-1ubuntu31:2.8.4-1ubuntu11:2.8.5-1ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | NVD, OSV | |
| products | CVE List, EUVD | |
| facts | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-89098 is a medium vulnerability (CVSS 5.5) in Red Hat Enterprise Linux 10, published October 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 3rd percentile. Fixed in nfs-utils 2.6.4-5.
References
access.redhat.com/security/cve/CVE-2026-89098
bugzilla.redhat.com/show_bug.cgi?id=2469511
nvd.nist.gov/vuln/detail/CVE-2026-89098
github.com/advisories/GHSA-7q29-687q-4m44
docs.bell-sw.com/security/cves/CVE-2026-89098
security-tracker.debian.org/tracker/CVE-2026-89098
ubuntu.com/security/CVE-2026-89098
cve.org/CVERecord?id=CVE-2026-89098