Vulnerability Details : CVE-2011-2521
The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.
Vulnerability category: Denial of service
Products affected by CVE-2011-2521
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Threat overview for CVE-2011-2521
Top countries where our scanners detected CVE-2011-2521
Top open port discovered on systems with this issue
49152
IPs affected by CVE-2011-2521 1,556
Threat actors abusing to this issue?
Yes
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2011-2521
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2011-2521
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
CWE ids for CVE-2011-2521
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2011-2521
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http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
404 Not FoundBroken Link
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc66c5210ec2539e800e87d7b3a985323c7be96e
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http://www.openwall.com/lists/oss-security/2011/07/06/4
oss-security - Re: CVE request: kernel: perf, x86: fix Intel fixed counters base initializationMailing List;Third Party Advisory
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https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e
perf, x86: Fix Intel fixed counters base initialization · torvalds/linux@fc66c52 · GitHubPatch;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=719228
719228 – (CVE-2011-2521) CVE-2011-2521 kernel: perf, x86: fix Intel fixed counters base initializationIssue Tracking;Third Party Advisory
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