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CVE-2006-4342

The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to...

5.5 MediumFix available

CVE-2006-4342 is a medium vulnerability (CVSS 5.5) in Redhat Enterprise Linux, published October 17, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in kernel 0:2.4.21-47.0.1.EL.

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.

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

0.39%Down 0.6 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.5

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.

Record
CVE-2006-4342
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:L/AC:H/Au:N/C:N/I:N/A:C
Weakness
CWE-667
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2006-4342
Updated
2026-11-02
EUVDEUVD-2006-4330 No score

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.

Record
EUVD-2006-4330
Updated
2026-11-03
GitHub AdvisoriesGHSA-876r-chc7-85m3 5.5

The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to...

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.

Record
GHSA-876r-chc7-85m3
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-667
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::as
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
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Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::desktop
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::es
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::ws
 before 0:2.4.21-47.0.1.EL
0:2.4.21-47.0.1.EL

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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