---
title: "CVE-2017-1000253: Linux Kernel PIE Stack Buffer Corruption Vulnerability "
url: https://erroneo.us/security/cve/CVE-2017-1000253/
description: "CVE-2017-1000253 (Linux Kernel): Exploited in the wild (CISA KEV). Linux distributions that have not patched their long-term kernels with…"
type: vulnerability-record
section: "Security Digest"
date_published: 2017-10-04
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2017-1000253"
kev: true
cvss: 7.8
epss: 0.10695
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2017-1000253: Linux Kernel PIE Stack Buffer Corruption Vulnerability 

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Linux Kernel. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-09-09, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-09-30 ; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns .
- EPSS 10.7% , percentile 96: FIRST’s model estimates a 10.7% chance of exploitation activity in the next 30 days, higher than 96% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

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 CONFIGARCHBINFMTELFRANDOMIZEPIE enabled, and a normal top-down address allocation strategy, loadelfbinary() will attempt to map a PIE binary into an address range immediately below mm->mmapbase. Unfortunately, loadelf binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PTLOAD segment is mapped below mm->mmapbase, the subsequent PTLOAD segment(s) end up being mapped above mm->mmapbase into the are that is supposed to be the "gap" between the stack and the binary.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 7.8 `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2024-09-09; federal due date 2024-09-30. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 10.70% probability of exploitation activity in the next 30 days; percentile 96.

## Sources

- [RHSA-2017:2798](https://access.redhat.com/errata/RHSA-2017:2798)
- [RHSA-2017:2795](https://access.redhat.com/errata/RHSA-2017:2795)
- [RHSA-2017:2801](https://access.redhat.com/errata/RHSA-2017:2801)
- [RHSA-2017:2796](https://access.redhat.com/errata/RHSA-2017:2796)
- [RHSA-2017:2799](https://access.redhat.com/errata/RHSA-2017:2799)
- [RHSA-2017:2794](https://access.redhat.com/errata/RHSA-2017:2794)
- [RHSA-2017:2793](https://access.redhat.com/errata/RHSA-2017:2793)
- [RHSA-2017:2797](https://access.redhat.com/errata/RHSA-2017:2797)
- [RHSA-2017:2802](https://access.redhat.com/errata/RHSA-2017:2802)
- [RHSA-2017:2800](https://access.redhat.com/errata/RHSA-2017:2800)
- [Listed in CISA KEV notes (git.kernel.org)](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a87938b2e246b81b4fb713edb371a9fa3c5c3c86)
- [CVE.org record CVE-2017-1000253](https://www.cve.org/CVERecord?id=CVE-2017-1000253)
- [NVD entry CVE-2017-1000253](https://nvd.nist.gov/vuln/detail/CVE-2017-1000253)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-1000253)
- [1039434](http://www.securitytracker.com/id/1039434)
- [101010](http://www.securityfocus.com/bid/101010)
- [qualys.com](https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt)

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Source page: https://erroneo.us/security/cve/CVE-2017-1000253/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt