CVE-2015-3027 — Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program

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MEDIUM

Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program

Published Apr 10, 2015

5.0

MEDIUM

CVSS 2.0

EPSS 1.30%

Description

Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.30% 0.01299

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01299

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.30% (0.01299)	69.37th	v5 (v2026.06.15)
Jun 15, 2026	1.30% (0.01299)	66.57th	v5 (v2026.06.15)
Mar 17, 2025	0.31% (0.00314)	52.30th	v4 (v2025.03.14)
Dec 12, 2024	0.17% (0.00172)	55.49th	v3 (v2023.03.01)
Jul 10, 2024	0.17% (0.00172)	54.49th	v3 (v2023.03.01)
Mar 7, 2023	0.17% (0.00172)	52.45th	v3 (v2023.03.01)
Mar 6, 2023	1.02% (0.01018)	40.69th	v2 (v2022.01.01)
Sep 10, 2022	1.02% (0.01018)	38.88th	v2 (v2022.01.01)
Apr 1, 2022	1.02% (0.01018)	36.86th	v2 (v2022.01.01)
Feb 4, 2022	1.02% (0.01018)	19.50th	v2 (v2022.01.01)

Weaknesses (1)

CWE-264

References (4)

http://lists.apple.com/archives/security-announce/2015/Apr/msg00004.html
vendor-advisoryx_refsource_APPLEVendor Advisory
http://www.securityfocus.com/bid/73987
vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1032081
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://support.apple.com/HT204663
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
http://lists.apple.com/archives/security-announce/2015/Apr/msg00004.html		vendor-advisoryx_refsource_APPLEVendor Advisory
http://www.securityfocus.com/bid/73987		vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1032081		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://support.apple.com/HT204663		x_refsource_CONFIRMVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Apr 10, 2015

Updated Aug 6, 2024

Reserved Apr 8, 2015

Link CVE-2015-3027

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-3027

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-3027