CVE-2011-4621
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization,...
5.5 Medium
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.
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
0.44%Down 0.5 points since Feb 4, 2022
What each source reports
NVD Score used
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.
- Record
CVE-2011-4621- 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 - CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-835
- Updated
- 2026-11-02
CVE List No score
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.
- Record
CVE-2011-4621- Updated
- 2026-11-02
EUVDEUVD-2011-4544 No score
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.
- Record
EUVD-2011-4544- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pm23-x64q-p9f3
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization,...
The Linux kernel before 2.6.37 does not properly implement a certain clock-update optimization, which allows local users to cause a denial of service (system hang) via an application that executes code in a loop.
- Record
GHSA-pm23-x64q-p9f3- 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-835
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
kernelRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debugRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-develRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-i686Red Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-develRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-docRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-firmwareRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
Show 51 moreShow less
| Package | Affected | Fixed |
|---|---|---|
kernel-headersRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perfRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perf-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
python-perfRed Hat:enterprise_linux:6::client From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernelRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debugRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-develRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-develRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-docRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-firmwareRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-headersRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perfRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perf-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
python-perfRed Hat:enterprise_linux:6::computenode From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernelRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-bootwrapperRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debugRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-develRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-i686Red Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-ppc64Red Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-s390xRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-develRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-docRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-firmwareRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-headersRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-kdumpRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-kdump-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-kdump-develRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perfRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perf-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
python-perfRed Hat:enterprise_linux:6::server From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernelRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debugRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debug-develRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-i686Red Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-develRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-docRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-firmwareRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
kernel-headersRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perfRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
perf-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
python-perfRed Hat:enterprise_linux:6::workstation From an advisory covering 2 CVEs |
before 0:2.6.32-220.2.1.el6 | 0:2.6.32-220.2.1.el6 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-4621 is a medium vulnerability (CVSS 5.5) in Linux Kernel, published May 17, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. No source names a fixed version.
References
github.com/torvalds/linux/commit/f26f9aff6aaf67e9a430d16c266f91b13a5bff64
ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37
openwall.com/lists/oss-security/2011/12/21/6
bugzilla.redhat.com/show_bug.cgi?id=769711
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f26f9aff6aaf67e9a430d16c266f91b13a5bff64
nvd.nist.gov/vuln/detail/CVE-2011-4621
Show 11 moreShow less
access.redhat.com/errata/RHSA-2011:1849
security.access.redhat.com/data/csaf/v2/advisories/2011/rhsa-2011_1849.json
cve.org/CVERecord?id=CVE-2011-4127