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Linux CVE-2013-2094

HIGH
Numeric Errors (CWE-189)
2013-05-14 secalert@redhat.com
8.4
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Numeric handling
Impact

CVSS score of 8.4 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, no user interaction not required. CISA has confirmed active exploitation in the wild. Public proof-of-concept exploit code is available. EPSS exploitation probability: 65.85%.

Exploit ScenarioDerived

Successful exploitation could compromise the high-severity affected system.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.
Exploited in the wild (CISA KEV) Patch available 65.9% exploitation probability (EPSS)

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AnalysisAI

The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open. Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

This vulnerability is classified under CWE-189. The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call. Affected products include: Linux Linux Kernel. Version information: before 3.8.9.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Added to CISA KEV
Apr 21, 2026 - 15:31 CISA
CVE Published
May 14, 2013 - 20:55 cve.org
HIGH 8.4

DescriptionCVE.org

The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call.

Threat Intelligence Overview

Threat Score
6.7/10
Composite threat intelligence
EPSS Score
65.9%
Top 1% exploitable
Exploit
POC
Public exploit code exists
Data Quality
7 sources
Confidence: High
NVD CVE.org CISA KEV EPSS Exploit-DB GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV Yes
Public POC Yes
EPSS 65.9%
Patch available Yes
Active threat Yes
Deciding rule
In CISA KEV with patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
Active
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
High

Priority Score

178
Low Medium High Critical
KEV: +50
EPSS: +66
CVSS: +42
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

References

Advisories & patches
PATCH http://twitter.com/djrbliss/statuses/334301992648331267 ADVISORY https://vuldb.com/vuln/8744 REF http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8176cced706b5e5d15887584150764894e94e02f REF http://lists.centos.org/pipermail/centos-announce/2013-May/019729.html REF http://lists.centos.org/pipermail/centos-announce/2013-May/019733.html REF http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00008.html REF http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html REF http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html REF http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00009.html REF http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00017.html REF http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03652.html REF http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03976.html REF http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/04302.html REF http://news.ycombinator.com/item?id=5703758 REF http://rhn.redhat.com/errata/RHSA-2013-0830.html REF http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9 REF http://www.mandriva.com/security/advisories?name=MDVSA-2013:176 REF http://www.openwall.com/lists/oss-security/2013/05/14/6 REF http://www.osvdb.org/93361 REF http://www.reddit.com/r/netsec/comments/1eb9iw REF http://www.ubuntu.com/usn/USN-1825-1 REF http://www.ubuntu.com/usn/USN-1826-1 REF http://www.ubuntu.com/usn/USN-1827-1 REF http://www.ubuntu.com/usn/USN-1828-1 REF http://www.ubuntu.com/usn/USN-1836-1 REF http://www.ubuntu.com/usn/USN-1838-1 REF https://bugzilla.redhat.com/show_bug.cgi?id=962792 REF https://github.com/torvalds/linux/commit/8176cced706b5e5d15887584150764894e94e02f REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-2094

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