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.

Published: 2015-04-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-3027 is rated Moderate Risk (44.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.30%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-3027

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.42% 1.30% +0.88%
2 2026-04-29 0.31% 0.42% +0.10%
3 2025-03-30 — 0.31% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-3027

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2015-3027

OS Trackers for CVE-2015-3027

vendor priority summary link
ubuntu low CVE-2015-3027 low priority: Ubuntu including 7 source packages (llvm, llvm-toolchain-3.2, …), 91 status rows across 13 suites (artful, bionic, cosmic, lucid, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 66, ignored 18, needs-triage 7. https://ubuntu.com/security/CVE-2015-3027

Affected software / configurations for CVE-2015-3027

Vendor Product Version Raw CPE
apple xcode <= 6.2 cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*

References for CVE-2015-3027

cvelogic Threat Intelligence