Is CVE-2017-1000253 being actively exploited?

Yes. CVE-2017-1000253 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on September 9, 2024.

What is the CVSS score for CVE-2017-1000253?

CVE-2017-1000253 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2017-1000253

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 10.7%EU EUVD: exploited

Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 10.7% (96th percentile)
In CISA KEV: Yes, added September 9, 2024
In EU EUVD: Yes (EUVD-2017-1514)
Published: October 5, 2017
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Linux Kernel PIE Stack Buffer Corruption Vulnerability

Added to the KEV catalog on September 9, 2024; federal remediation due September 30, 2024. Known to be used in ransomware campaigns.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-1514 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
centos / centos
linux / linux kernel
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux

Certified products that may be affected

24 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4498 - historical
Red Hat Enterprise Linux 7 Kernel Crypto API Cryptographic Module - Red Hat®, Inc. - FIPS 140 3939 - historical
Red Hat Enterprise Linux 7 OpenSSH Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 3891 - historical
Red Hat Enterprise Linux 7 OpenSSH Client Cryptographic Module - Red Hat®, Inc. - FIPS 140 3892 - historical
Red Hat Enterprise Linux 7 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 3867 - historical

See all 24 in the Security Certifications Explorer.

References

http://www.securityfocus.com/bid/101010(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1039434(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2017:2793(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2794(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2795(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2796(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2797(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2798(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2799(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2800(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2801(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2017:2802(Third Party Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-1000253(US Government Resource)
https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt(Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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