CVE-2011-2918

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

The Performance Events subsystem in the Linux kernel before 3.1 does not properly handle event overflows associated with PERF_COUNT_SW_CPU_CLOCK events, which allows local users to cause a denial of service (system hang) via a crafted application.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
56.0%
KEV
Not listed

Published

May 24, 2012

Last Modified

April 29, 2026

Advisory Details (4)

Auto-updated May 29, 2026
Patch available. Sources: redhat, github_commit.
github_commit

commit a8b0ca17b80e (torvalds/linux)

Fix landed in torvalds/linux commit a8b0ca17b80e — awaiting tagged release

https://github.com/torvalds/linux/commit/a8b0ca17b80e92faab46ee7179ba9e99ccb61233
redhat Patch Available

730706 – (CVE-2011-2918) CVE-2011-2918 kernel: perf: Fix software event overflow

Affected: Red Hat Enterprise Linux 4 and 5 as they did not include support for perf. This has been addressed in Red Hat Enterprise Linux

https://bugzilla.redhat.com/show_bug.cgi?id=730706
generic

oss-security - Re: CVE request -- kernel: perf: fix software event overflow

http://www.openwall.com/lists/oss-security/2011/08/16/1
generic
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1

Vendor Advisories for CVE-2011-2918(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.32-418-dove (2.6.32-418.36) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-virtual (2.6.35-30.60~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-903-omap4 (2.6.35-903.24) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.38-11-server (2.6.38-11.50) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-powerpc (2.6.35-30.60) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-218-dove (2.6.32-218.36) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-34-lpia (2.6.32-34.77) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-12-generic (2.6.38-12.51~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-318-ec2 (2.6.32-318.38) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-1209-omap4 (2.6.38-1209.15) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.31-610-imx51 (2.6.31-610.28) @ lucid2026-05-29ubuntu
redhatkernel-rt-0:3.0.18-rt34.53.el6rt2012-02-23redhat
redhatkernel-0:2.6.32-131.17.1.el62011-10-05redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(12)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
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  1. 2026-06-19 19:22 UTCEPSS rescore
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  37. 2026-05-29 13:41 UTCEPSS rescore
  38. 2026-05-29 13:40 UTCEPSS rescore
  39. 2026-05-29 04:29 UTCEG score recompute
  40. 2026-05-29 04:29 UTCVendor advisory
  41. 2026-05-29 04:29 UTCGHSA enrichment
  42. 2026-05-28 13:42 UTCEPSS rescore
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  44. 2026-05-28 13:42 UTCEPSS rescore
  45. 2026-05-27 13:38 UTCEPSS rescore
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  61. 2026-05-18 21:29 UTCEPSS rescore
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-17769
    First seen Sep 1, 2011

    Linux Kernel 3.0.0 - 'perf_count_sw_cpu_clock' event Denial of Service

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2011-2918?
CVE-2011-2918 is a medium vulnerability published on May 24, 2012. The Performance Events subsystem in the Linux kernel before 3.1 does not properly handle event overflows associated with PERFCOUNTSWCPUCLOCK events, which allows local users to cause a denial of service (system hang) via a crafted application.
When was CVE-2011-2918 disclosed?
CVE-2011-2918 was first published in the National Vulnerability Database on May 24, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-2918 actively exploited?
CVE-2011-2918 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-2918?
CVE-2011-2918 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2011-2918?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-2918, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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