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TI-2011-02183 Aliases CVE-2011-2491GHSA-23hf-jhww-867g

The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in…

Priority LOW 23CWE-400Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in the Linux kernel before 3.0 allows local users to cause a denial of service (system hang) via a LOCK_UN flock system call.

Why it matters now

EPSS 0.00399 34th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 5 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 3.0VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 3.0 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat

Remediation

Red Hat 4 advisories

  • RHSA-2011:1813 Released 2011-12-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux EUS (v. 5.6 server) kernel-2.6.18-238.31.1.el5, kernel-2.6.18-238.31.1.el5.ia64, kernel-PAE-2.6.18-238.31.1.el5 +14
  • RHSA-2011:1253 Released 2011-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-devel-2.6.33.9-rt31.75.el6rt +7
  • RHSA-2011:1212 Released 2011-09-06 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-274.3.1.el5, kernel-2.6.18-274.3.1.el5.ia64, kernel-PAE-2.6.18-274.3.1.el5 +14
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-274.3.1.el5, kernel-PAE-2.6.18-274.3.1.el5, kernel-PAE-devel-2.6.18-274.3.1.el5 +6
Show 1 more Red Hat advisories
  • RHSA-2011:1189 Released 2011-08-23 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-131.12.1.el6, kernel-bootwrapper-2.6.32-131.12.1.el6, kernel-debug-2.6.32-131.12.1.el6 +8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise MRG 1AffectedNo fix yet
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2011:1212
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2011:1212
Red Hat Enterprise Linux EUS (v. 5.6 server)Fixed RHSA-2011:1813
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:1189
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2011:1253

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-2491
  2. 2026-10-03 Alias added: GHSA-23hf-jhww-867g

References

Patch 3

Advisory 1

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences