CVE-2013-2094
HighExploitedPublic exploitThe 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.
Published May 14, 2013 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2013-2094, UBUNTU-CVE-2013-2094
Key Facts
Patch immediately- CVE-2013-2094 is a high-severity vulnerability (CVSS 8.4 v3.1) affecting Linux Kernel, linux (debian), rootio-linux and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 17, 2013. Public exploit code is available.
- EPSS estimates a 48% probability of exploitation in the next 30 days.
- Fixed versions are available, including cluster-network-kmp-rt 1.4_3.0.101_rt130_0.28-2.27.99, cluster-network-kmp-rt_trace 1.4_3.0.101_rt130_0.28-2.27.99, drbd-kmp-rt 8.4.4_3.0.101_rt130_0.28-0.22.65.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
48%
Higher than 98.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2013-2094 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Sep 15, 2022 | Oct 6, 2022 | Not reported |
| Industry KEV feed | May 17, 2013 | Oct 6, 2022 | Not reported |
| CIRCL KEV | Sep 15, 2022 | Oct 6, 2022 | Not reported |
| ENISA EUVD | Sep 15, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
139 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | See advisory | 3.0.75 |
| linuxdebian | See advisory | 3.8.11-1 |
| rootio-linuxrootio | See advisory | 3.8.11-1 |
| kernel-debuginfo-common-i686amazon | See advisory | 3.4.43-43.43.amzn1 |
| kernel-debuginfo-common-x86_64amazon | See advisory | 3.4.43-43.43.amzn1 |
Patched Releases
cluster-network-kmp-rt
1.4_3.0.101_rt130_0.28-2.27.99
cluster-network-kmp-rt_trace
1.4_3.0.101_rt130_0.28-2.27.99
drbd-kmp-rt
8.4.4_3.0.101_rt130_0.28-0.22.65
drbd-kmp-rt_trace
8.4.4_3.0.101_rt130_0.28-0.22.65
iscsitarget-kmp-rt
1.4.20_3.0.101_rt130_0.28-0.38.84
iscsitarget-kmp-rt_trace
1.4.20_3.0.101_rt130_0.28-0.38.84
kernel
0:2.6.32-358.6.2.el6, 2.6.32-358.6.2.el6, 3.4.43-43.43.amzn1, 5.15.153.1-1, 6.6.22.1-2
kernel-debug
2.6.32-358.6.2.el6
kernel-debug-devel
2.6.32-358.6.2.el6
kernel-debuginfo-common-i686
3.4.43-43.43.amzn1
kernel-debuginfo-common-x86_64
3.4.43-43.43.amzn1
kernel-default
3.0.101-0.7.17.1
kernel-default-base
3.0.101-0.7.17.1
kernel-default-devel
3.0.101-0.7.17.1
kernel-default-man
3.0.101-0.7.17.1
kernel-devel
2.6.32-358.6.2.el6, 3.4.43-43.43.amzn1
kernel-doc
2.6.32-358.6.2.el6, 3.4.43-43.43.amzn1
kernel-ec2
3.0.101-0.7.17.1
kernel-ec2-base
3.0.101-0.7.17.1
kernel-ec2-devel
3.0.101-0.7.17.1
kernel-firmware
2.6.32-358.6.2.el6
kernel-headers
2.6.32-358.6.2.el6, 3.4.43-43.43.amzn1
kernel-pae
3.0.101-0.7.17.1
kernel-pae-base
3.0.101-0.7.17.1
kernel-pae-devel
3.0.101-0.7.17.1
Timeline
Publicly disclosed
May 14, 2013
Added to Industry KEV feed
May 17, 2013
Added to CISA KEV
Sep 15, 2022
Added to CIRCL KEV
Sep 15, 2022
Added to ENISA EUVD
Sep 15, 2022
Last updated
Aug 4, 2026
Weakness Type
- CWE-189
- CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input
References
- advisory[CentOS-announce] 20130515 CentOS-6 CVE-2013-2094 Kernel Issue
- advisory[CentOS-announce] 20130517 CESA-2013:0830 Important CentOS 6 kernel Update
- advisorySUSE-SU-2013:0819
- advisoryopenSUSE-SU-2013:0847
- advisoryopenSUSE-SU-2013:0925
FAQ
Common Questions.
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: Linux Kernel; linux (debian); rootio-linux, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 17, 2013.
Yes. It was added on Sep 15, 2022 with a federal remediation due date of Oct 6, 2022.
Public exploit code is available.
Fixed versions are available, including cluster-network-kmp-rt 1.4_3.0.101_rt130_0.28-2.27.99, cluster-network-kmp-rt_trace 1.4_3.0.101_rt130_0.28-2.27.99, drbd-kmp-rt 8.4.4_3.0.101_rt130_0.28-0.22.65.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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