What’s Vulnerable › Vulnerabilities

CVE-2017-1000371

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-06-19 · updated 2026-06-17

Description

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This affects Linux Kernel version 4.11.5. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365. This issue appears to be limited to i386 based systems.

Affected products

• Linux kernel: from 4.1 before 4.1.43; from 4.2 before 4.4.78; from 4.5 before 4.9.39; from 4.10 before 4.11.12; from 4.12 before 4.12.3 — fixed in 4.1.43, 4.11.12, 4.12.3, 4.4.78, 4.9.39

How to fix

Upgrade to a fixed version: Linux kernel 4.1.43, 4.11.12, 4.12.3, 4.4.78. Check the vendor advisory for mitigations.

References

• http://www.debian.org/security/2017/dsa-3981
• http://www.securityfocus.com/bid/99131
• https://access.redhat.com/security/cve/CVE-2017-1000371
• https://www.exploit-db.com/exploits/42273/
• https://www.exploit-db.com/exploits/42276/
• https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
• http://www.debian.org/security/2017/dsa-3981
• http://www.securityfocus.com/bid/99131
• https://access.redhat.com/security/cve/CVE-2017-1000371
• https://www.exploit-db.com/exploits/42273/
• https://www.exploit-db.com/exploits/42276/
• https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

Get alerted when CVE-2017-1000371 or the next vulnerability affects your stack