Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2017-1000253

Kernel

Linux / Kernel · 6.0

Watch CVE-2017-1000253 Browse KEV feed
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
10.7%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2017-1000253 is a vulnerability affecting Linux Kernel. Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV.

Who is affected?

Linux / Kernel 6.0.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Kernel

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.

centos Affected
centos
6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.1406 7.1503 7.1511 7.1611
redhat Affected
enterprise_linux
6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3
linux Affected
linux_kernel
Before 3.2.70 Before 3.4.109 Before 3.10.77 Before 3.12.43 Before 3.14.41 Before 3.16.35 Before 3.18.14 Before 3.19.7 Before 4.0.2
View vendor advisory (opens in new tab)
Published
04 Oct 2017
Exploitation Reported
09 Sep 2024
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None

Tags

ransomware cisa malware linux nessus_scanner

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2017-1000253
  • RHSA-2017:2798 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2798
  • RHSA-2017:2795 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2795
  • RHSA-2017:2801 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2801
  • RHSA-2017:2796 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2796
  • RHSA-2017:2799 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2799
  • RHSA-2017:2794 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2794
  • RHSA-2017:2793 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2793
  • RHSA-2017:2797 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2797
  • RHSA-2017:2802 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2802
  • RHSA-2017:2800 access.redhat.com · Vendor Advisory https://access.redhat.com/errata/RHSA-2017:2800
  • 1039434 securitytracker.com · VDB Entry http://www.securitytracker.com/id/1039434
  • 101010 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/101010
  • qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253... qualys.com · CVE Record https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 09 Sep 2024

A trusted third party reported exploitation.

Used in malware

CISA

Recorded 09 Sep 2024

Malware families have been linked to exploitation of this CVE.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2024-09-09 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/210304 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

10.7%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-119

All CVSS Scores

CVSS v3.1 7.8 High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 7.2 High

AV:L/AC:L/Au:N/C:C/I:C/A:C

Timeline

From disclosure to observed exploitation

  1. 09:26 UTC

    Nessus plugin available

    Scanner coverage available

  2. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. 00:00 UTC

    First public exploitation report

    Exploit observed in malware

  4. 01:00 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2017-1000253

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2017-1000253",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.10695,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}