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 3.0

8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

2.7% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-25)

CWE

CWE-209

Published

2019-05-22

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• gnu:gcc

References

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

Check your stackJSON