CVE-2015-6526
kernel: perf on ppc64 can loop forever getting userlevel stacktraces
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · April 13, 2015
Updated · November 21, 2025
Description
A flaw was found in the way the Linux kernel's perf subsystem retrieved userlevel stack traces on PowerPC systems. A local, unprivileged user could use this flaw to cause a denial of service on the system by creating a special stack layout that would force the perf_callchain_user_64() function into an infinite loop.
Statement
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7 and may be addressed in a future update.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')