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CVE-2018-12886

stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler...

8.1 High

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.74%Up 2.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 8.1

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.

Record
CVE-2018-12886
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-209
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2018-12886
Updated
2026-11-02
EUVDEUVD-2018-4839 No score

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.

Record
EUVD-2018-4839
Updated
2026-11-02
GitHub AdvisoriesGHSA-5mwp-7q9c-cgg2 8.1

stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler...

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.

Record
GHSA-5mwp-7q9c-cgg2
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-209
Updated
2026-11-02
OSV 8.1

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.

Record
CVE-2018-12886
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-12886 8.1

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.

Record
UBUNTU-CVE-2018-12886
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gcc-4.8
Ubuntu:14.04:LTS
 All versions, plus listed versions
4.8.1-10ubuntu84.8.2-1ubuntu14.8.2-1ubuntu24.8.2-10ubuntu14.8.2-10ubuntu2
Show 18 moreShow less
4.8.2-12ubuntu24.8.2-13ubuntu14.8.2-14ubuntu14.8.2-14ubuntu24.8.2-14ubuntu44.8.2-15ubuntu34.8.2-16ubuntu14.8.2-16ubuntu34.8.2-16ubuntu44.8.2-16ubuntu54.8.2-16ubuntu64.8.2-17ubuntu14.8.2-17ubuntu24.8.2-19ubuntu14.8.4-2ubuntu1~14.044.8.4-2ubuntu1~14.04.14.8.4-2ubuntu1~14.04.34.8.4-2ubuntu1~14.04.4
 None known
gcc-4.8
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.8.5-1ubuntu14.8.5-2ubuntu14.8.5-3ubuntu14.8.5-3ubuntu24.8.5-3ubuntu34.8.5-4ubuntu14.8.5-4ubuntu2
 None known
gcc-4.9
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.9.3-5ubuntu14.9.3-6ubuntu24.9.3-8ubuntu14.9.3-8ubuntu24.9.3-9ubuntu1
Show 4 moreShow less
4.9.3-11ubuntu14.9.3-11ubuntu24.9.3-12ubuntu14.9.3-13ubuntu2
 None known
gcc-arm-none-eabi
Ubuntu:16.04:LTS
 All versions, plus listed versions
15:4.9.3+svn227297-115:4.9.3+svn227297-1build115:4.9.3+svn231177-1
 None known
gcc-snapshot
Ubuntu:16.04:LTS
 All versions, plus listed versions
20151011-0ubuntu120151030-1ubuntu220151104-0ubuntu120151122-1ubuntu120151209-0ubuntu1
Show 5 moreShow less
20151215-0ubuntu120160105-1ubuntu120160125-1ubuntu120160320-1ubuntu120160415-0ubuntu1
 None known
gcc-7
Ubuntu:18.04:LTS
 All versions, plus listed versions
7.2.0-8ubuntu37.2.0-12ubuntu17.2.0-13ubuntu17.2.0-16ubuntu17.2.0-17ubuntu1
Show 14 moreShow less
7.2.0-18ubuntu27.3.0-3ubuntu17.3.0-5ubuntu17.3.0-11ubuntu17.3.0-12ubuntu17.3.0-13ubuntu17.3.0-14ubuntu17.3.0-15ubuntu27.3.0-16ubuntu27.3.0-16ubuntu37.3.0-27ubuntu1~18.047.4.0-1ubuntu1~18.047.4.0-1ubuntu1~18.04.17.5.0-3ubuntu1~18.04
 None known
gcc-8
Ubuntu:18.04:LTS
 All versions, plus listed versions
8-20180208-0ubuntu18-20180218-1ubuntu18-20180312-2ubuntu18-20180319-1ubuntu28-20180321-1ubuntu1
Show 11 moreShow less
8-20180331-1ubuntu18-20180402-1ubuntu18-20180406-0ubuntu18-20180408-0ubuntu18-20180414-1ubuntu18-20180414-1ubuntu28.2.0-1ubuntu2~18.048.3.0-6ubuntu1~18.048.3.0-6ubuntu1~18.04.18.3.0-26ubuntu1~18.048.4.0-1ubuntu1~18.04
 None known
gcc-4.8
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.8.5-4ubuntu64.8.5-4ubuntu74.8.5-4ubuntu8
 None known
gcc-6
Ubuntu:18.04:LTS
 All versions, plus listed versions
6.4.0-8ubuntu16.4.0-9ubuntu16.4.0-10ubuntu16.4.0-11ubuntu16.4.0-12ubuntu1
Show 5 moreShow less
6.4.0-13ubuntu16.4.0-15ubuntu16.4.0-16ubuntu16.4.0-17ubuntu16.5.0-2ubuntu1~18.04
 None known
gcc-arm-none-eabi
Ubuntu:18.04:LTS
 All versions, plus listed versions
15:5.4.1+svn241155-115:6.3.1+svn253039-115:6.3.1+svn253039-1build1
 None known
Show 14 moreShow less
Affected packages
PackageAffectedFixed
gcc-snapshot
Ubuntu:18.04:LTS
 All versions, plus listed versions
20171017-1ubuntu120171109-1ubuntu120180107-1ubuntu120180130-0ubuntu220180216-1ubuntu11:20180322-1ubuntu11:20180425-1ubuntu1
 None known
gcc-7
Ubuntu:20.04:LTS
 All versions, plus listed versions
7.4.0-14ubuntu27.4.0-15ubuntu17.5.0-1ubuntu17.5.0-2ubuntu17.5.0-3ubuntu17.5.0-4ubuntu17.5.0-4ubuntu47.5.0-6ubuntu2
 None known
gcc-8
Ubuntu:20.04:LTS
 All versions, plus listed versions
8.3.0-23ubuntu28.3.0-24ubuntu18.3.0-25ubuntu38.3.0-26ubuntu18.3.0-27ubuntu1
Show 6 moreShow less
8.3.0-29ubuntu18.3.0-29ubuntu28.4.0-1ubuntu18.4.0-1ubuntu38.4.0-3ubuntu18.4.0-3ubuntu2
 None known
gcc-arm-none-eabi
Ubuntu:20.04:LTS
 All versions, plus listed versions
15:7-2018-q2-615:8-2019-q3-115:9-2019-q4-0ubuntu1
 None known
gcc-arm-none-eabi
Ubuntu:22.04:LTS
 All versions, plus listed versions
15:9-2019-q4-0ubuntu215:10.3-2021.07-115:10.3-2021.07-215:10.3-2021.07-315:10.3-2021.07-4
 None known
gcc-snapshot
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:20210827-1ubuntu11:20220117-1ubuntu1
 None known
gcc-arm-none-eabi
Ubuntu:24.04:LTS
 All versions, plus listed versions
15:12.2.rel1-115:13.2.rel1-115:13.2.rel1-2
 None known
gcc-snapshot
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:20230928-1ubuntu11:20231130-1ubuntu11:20240117-1ubuntu1
 None known
gcc-arm-none-eabi
Ubuntu:25.10
 All versions, plus listed versions
15:14.2.rel1-1
 None known
gcc-snapshot
Ubuntu:25.10
 All versions, plus listed versions
1:20250322-1ubuntu11:20250502-1ubuntu11:20250601-1ubuntu11:20250617-1ubuntu11:20250804-1ubuntu11:20250828-1ubuntu11:20250921-1ubuntu1
 None known
gcc-arm-none-eabi
Ubuntu:26.10
 All versions, plus listed versions
15:14.2.rel1-115:15.3.rel1-1
 None known
gcc-snapshot
Ubuntu:26.10
 All versions, plus listed versions
1:20260306-1ubuntu11:20260902-1ubuntu11:20260920-0ubuntu1
 None known
gcc-arm-none-eabi
Ubuntu:26.04:LTS
 All versions, plus listed versions
15:14.2.rel1-1
 None known
gcc-snapshot
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:20250921-1ubuntu11:20251023-1ubuntu11:20260121-1ubuntu11:20260203-0ubuntu31:20260216-1ubuntu11:20260306-1ubuntu1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-12886 is a high vulnerability (CVSS 8.1) in Gnu Gcc, published May 22, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.74%, the 86th percentile. No source names a fixed version.

References

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