CVE-2015-6526

NONECVSS 0.0

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 13.2%
KEV: Not listed

Published

August 31, 2015

Last Modified

May 6, 2026

References (20)

cve@mitrehttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a5cbce421a283e6aea3c4007f141735bf9da8c3
cve@mitrehttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
cve@mitrehttp://www.openwall.com/lists/oss-security/2015/08/18/4
cve@mitrehttp://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
cve@mitrehttp://www.securityfocus.com/bid/76401
cve@mitrehttp://www.securitytracker.com/id/1033728
cve@mitrehttp://www.ubuntu.com/usn/USN-2759-1
cve@mitrehttp://www.ubuntu.com/usn/USN-2760-1
cve@mitrehttps://bugzilla.redhat.com/show_bug.cgi?id=1218454
cve@mitrehttps://github.com/torvalds/linux/commit/9a5cbce421a283e6aea3c4007f141735bf9da8c3
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a5cbce421a283e6aea3c4007f141735bf9da8c3
af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/08/18/4
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/76401

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-3.2.0-1471-omap4 (3.2.0-1471.92) @ precise	2026-05-22	ubuntu
ubuntu	linux-image-3.2.0-91-highbank (3.2.0-91.129) @ precise	2026-05-22	ubuntu
redhat	kernel-0:3.10.0-327.el7	2015-11-19	redhat

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.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 20× 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.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 04:56 UTCOSV refresh
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-6526?

CVE-2015-6526 is a none vulnerability published on August 31, 2015. The perfcallchainuser_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.

When was CVE-2015-6526 disclosed?

CVE-2015-6526 was first published in the National Vulnerability Database on August 31, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-6526 actively exploited?

CVE-2015-6526 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-6526?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-6526, 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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