The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users…
Priority LOW 25CWE-667Published · 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-667 and the CVSS impact.
Summary
The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to cause a denial of service (deadlock) by running the shmat function on an shm at the same time that shmctl is removing that shm (IPC_RMID), which prevents a spinlock from being unlocked.
Why it matters now
EPSS 0.0039 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2006:0710 Released 2006-10-20 · Red Hat rating Importantkernel security update
- Red Hat Desktop version 3 kernel-2.4.21-47.0.1.EL, kernel-2.4.21-47.0.1.EL.athlon, kernel-2.4.21-47.0.1.EL.ia32e +14
- Red Hat Enterprise Linux AS version 3 kernel-2.4.21-47.0.1.EL, kernel-2.4.21-47.0.1.EL.athlon, kernel-2.4.21-47.0.1.EL.ia32e +22
- Red Hat Enterprise Linux ES version 3 kernel-2.4.21-47.0.1.EL, kernel-2.4.21-47.0.1.EL.athlon, kernel-2.4.21-47.0.1.EL.ia32e +18
- Red Hat Enterprise Linux WS version 3 kernel-2.4.21-47.0.1.EL, kernel-2.4.21-47.0.1.EL.athlon, kernel-2.4.21-47.0.1.EL.ia32e +18
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2006:0710 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2006:0710 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2006:0710 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2006:0710 |
Timeline
- 2026-10-02 Threatist record created from CVE-2006-4342
- 2026-10-03 Alias added: GHSA-876r-chc7-85m3
References
More Red Hat Enterprise Linux vulnerabilities
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- TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
Sources
- CVE-2006-4342 · CVE Program
- CVE-2006-4342 · NVD
- FIRST EPSS
- GHSA-876r-chc7-85m3 · GitHub Advisory Database · CC BY 4.0
- CVE-2006-4342 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences