CVE-2017-1000253

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 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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-10-03 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2017-10-05 01:29 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2024-09-09 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2024-09-30 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-06-17 00:58 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 10.7% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-10-05 01:29 UTC

Last modified

2026-06-17 00:58 UTC

Added to CISA KEV

2024-09-09

Exploit probability

10.7% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Analyzed

Affected

• Centos 6.0
• Centos 6.1
• Centos 6.2
• Centos 6.3
• Centos 6.4
• Centos 6.5
• Centos 6.6
• Centos 6.7

Attack profile CVSS 3.1 · 7.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-1000253.md and follow it. Check whether this project is affected by CVE-2017-1000253. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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