CVE-2018-12886

stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler Collection (GCC) 4.1 through 8 (under certain circumstances) generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the protection of -fstack-protector, -fstack-protector-all, -fstack-protector-strong, and -fstack-protector-explicit against stack overflow by controlling what the stack canary is compared against.

CVSS v3 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3 : HIGH

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm-protos.h?revision=266379&view=markup	Vendor Advisory
https://www.gnu.org/software/gcc/gcc-8/changes.html	Exploit Vendor Advisory
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm-protos.h?revision=266379&view=markup	Vendor Advisory
https://www.gnu.org/software/gcc/gcc-8/changes.html	Exploit Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-565386.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:*

History

14 Oct 2026, 07:16

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-398330.html - () https://cert-portal.siemens.com/productcert/html/ssa-565386.html -

Information

Published : 2019-05-22 19:29

Updated : 2026-10-14 07:16

NVD link : CVE-2018-12886

Mitre link : CVE-2018-12886

CVE.ORG link : CVE-2018-12886

JSON object : View

Products Affected

gnu

gcc

CWE

CWE-209

Generation of Error Message Containing Sensitive Information

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