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TI-2009-03457 Aliases CVE-2009-3621GHSA-g479-4r8w-jx3w

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a…

Priority LOW 27CWE-400Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

Why it matters now

EPSS 0.00987 62nd percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix Fixed Red Hat: 3 advisories

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 · 15

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 2.6.31.4VulnerableLinux
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*6.06VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:*:*:*:*8.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*8.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*9.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*9.10VulnerableCanonical
cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:*10VulnerableFedoraproject
cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:*11.0VulnerableopenSUSE
cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*11.2VulnerableopenSUSE
cpe:2.3:o:suse:suse_linux_enterprise_desktop:10:sp2:*:*:*:*:*:*10 sp2VulnerableSUSE
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 2.6.31.4 Vulnerable ·Linux
  • cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* Versions 6.06 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:*:*:*:* Versions 8.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:* Versions 8.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:* Versions 9.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:* Versions 9.10 Vulnerable ·Canonical
  • cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:* Versions 10 Vulnerable ·Fedoraproject
  • cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·openSUSE
  • cpe:2.3:o:suse:suse_linux_enterprise_desktop:10:sp2:*:*:*:*:*:* Versions 10 sp2 Vulnerable ·SUSE
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:suse:suse_linux_enterprise_desktop:10:sp3:*:*:*:*:*:*10 sp3VulnerableSUSE
cpe:2.3:o:suse:suse_linux_enterprise_server:10:sp2:*:*:*:*:*:*10 sp2VulnerableSUSE
cpe:2.3:o:suse:suse_linux_enterprise_server:10:sp3:*:*:*:*:*:*10 sp3VulnerableSUSE
cpe:2.3:a:vmware:vma:4.0:*:*:*:*:*:*:*4.0VulnerableVMware
cpe:2.3:o:vmware:esx:4.0:*:*:*:*:*:*:*4.0VulnerableVMware
  • cpe:2.3:o:suse:suse_linux_enterprise_desktop:10:sp3:*:*:*:*:*:* Versions 10 sp3 Vulnerable ·SUSE
  • cpe:2.3:o:suse:suse_linux_enterprise_server:10:sp2:*:*:*:*:*:* Versions 10 sp2 Vulnerable ·SUSE
  • cpe:2.3:o:suse:suse_linux_enterprise_server:10:sp3:*:*:*:*:*:* Versions 10 sp3 Vulnerable ·SUSE
  • cpe:2.3:a:vmware:vma:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·VMware
  • cpe:2.3:o:vmware:esx:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·VMware

Remediation

Red Hat 3 advisories

  • RHSA-2009:1671 Released 2009-12-15 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux AS version 4 kernel-2.6.9-89.0.18.EL, kernel-2.6.9-89.0.18.EL.ia64, kernel-2.6.9-89.0.18.EL.ppc64iseries +14
    • Red Hat Enterprise Linux Desktop version 4 kernel-2.6.9-89.0.18.EL, kernel-devel-2.6.9-89.0.18.EL, kernel-doc-2.6.9-89.0.18.EL +8
    • Red Hat Enterprise Linux ES version 4 kernel-2.6.9-89.0.18.EL, kernel-2.6.9-89.0.18.EL.ia64, kernel-devel-2.6.9-89.0.18.EL +12
    • Red Hat Enterprise Linux WS version 4 kernel-2.6.9-89.0.18.EL, kernel-2.6.9-89.0.18.EL.ia64, kernel-devel-2.6.9-89.0.18.EL +12
  • RHSA-2009:1670 Released 2009-12-15 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-164.9.1.el5, kernel-2.6.18-164.9.1.el5.ia64, kernel-PAE-2.6.18-164.9.1.el5 +18
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-164.9.1.el5, kernel-PAE-2.6.18-164.9.1.el5, kernel-PAE-devel-2.6.18-164.9.1.el5 +8
  • RHSA-2009:1540 Released 2009-11-03 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • MRG Realtime for RHEL 5 Server kernel-rt-2.6.24.7-137.el5rt, kernel-rt-debug-2.6.24.7-137.el5rt, kernel-rt-debug-devel-2.6.24.7-137.el5rt +6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
MRG Realtime for RHEL 5 ServerFixed RHSA-2009:1540
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2009:1670
Red Hat Enterprise Linux AS version 4Fixed RHSA-2009:1671
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2009:1670
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2009:1671
Red Hat Enterprise Linux ES version 4Fixed RHSA-2009:1671
Red Hat Enterprise Linux WS version 4Fixed RHSA-2009:1671

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-3621
  2. 2026-10-03 Alias added: GHSA-g479-4r8w-jx3w

References

Exploit 4

Advisory 15

Other 2

Sources

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