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CVE-2015-3027

15
FAUCET Score

CVE-2015-3027 describes an incorrect register allocation vulnerability in Clang within LLVM, affecting Apple Xcode before version 6.3. This flaw could lead to stack storage of stack cookie pointers, potentially allowing attackers to bypass stack-guard protections in vulnerable C programs. With a CVSS score of 5.0 (medium severity), it has a network-based attack vector, low complexity, and a potential impact of partial integrity compromise. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.2CPE matchmatch criteria
cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 47th percentile among its peer group of 23,723 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2015/Apr/msg00004.html
Vendor Advisory
support.apple.com / HT204663
Vendor Advisory
securityfocus.com / bid/73987
securitytracker.com / id/1032081
Third Party AdvisoryVDB Entry