Vulnerability Details : CVE-2015-6526
The perf_callchain_user_64 function in arch/powerpc/perf/callchain.c in the Linux kernel before 4.0.2 on ppc64 platforms allows local users to cause a denial of service (infinite loop) via a deep 64-bit userspace backtrace.
Vulnerability category: Denial of service
Products affected by CVE-2015-6526
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-6526
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 13 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-6526
| 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-2015-6526
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-6526
-
https://bugzilla.redhat.com/show_bug.cgi?id=1218454
1218454 – (CVE-2015-6526) CVE-2015-6526 kernel: perf on ppc64 can loop forever getting userlevel stacktraces
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http://www.openwall.com/lists/oss-security/2015/08/18/4
oss-security - CVE request - Linux kernel - perf on ppp64 - unbounded checks in perf_callchain_user_64 denial of service.
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http://www.securitytracker.com/id/1033728
Linux Kernel Infinite Loop in perf_callchain_user_64() Lets Local Users Cause Denial of Service Conditions on the Target System - SecurityTracker
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http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Oracle Linux Bulletin - October 2015
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http://www.ubuntu.com/usn/USN-2760-1
USN-2760-1: Linux kernel (OMAP4) vulnerabilities | Ubuntu security notices
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https://github.com/torvalds/linux/commit/9a5cbce421a283e6aea3c4007f141735bf9da8c3
powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH · torvalds/linux@9a5cbce · GitHub
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
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http://www.ubuntu.com/usn/USN-2759-1
USN-2759-1: Linux kernel vulnerabilities | Ubuntu security notices
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http://www.securityfocus.com/bid/76401
Linux Kernel 'perf_callchain_user_64()' Function Denial of Service Vulnerability
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a5cbce421a283e6aea3c4007f141735bf9da8c3
kernel/git/torvalds/linux.git - Linux kernel source tree
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