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CVE-2018-6952

28
FAUCET Score

CVE-2018-6952 is a double free vulnerability in the another_hunk function within pch.c of GNU patch versions up to 2.7.6. This flaw carries a CVSS v3.0 score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, leading to a high impact on availability. While the vulnerability is severe, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.7.6CPE matchmatch criteria
cpe:2.3:a:gnu:patch:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.19%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0819 is in the 91st percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (34)

microsoftpatch availablevia msrc
Product: patch-2.7.6-9.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: 16927-16817Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: 16925-16820Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 16926-16823Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: azl3 patch 2.7.6-9 on Azure Linux 3.0Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: cm1 patch 2.7.6-7 on CBL Mariner 1.0Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: cbl2 patch 2.7.6-7 on CBL Mariner 2.0Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-debuginfo-2.7.6-7.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-2.7.6-9.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: 16927-17084Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: 13120-12137Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13121-12137Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13122-12138Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13123-12138Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13124-12139Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13125-12139Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13126-12140Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13127-12140Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: 13128-12356Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: 13129-12357Fixed in: 2.7.6-9
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-2.7.6-7.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-debuginfo-2.7.6-7.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-2.7.6-7.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-debuginfo-2.7.6-7.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-2.7.6-7.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-debuginfo-2.7.6-7.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 2.7.6-7
microsoftpatch availablevia msrc
Product: patch-2.7.6-7.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 2.7.6-7
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: patch-0:2.7.1-11.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: patch

Vendor Advisories (4)

microsoft2024-Jun/CVE-2018-6952

CVE-2018-6952

Jun 11, 2024
microsoft2020-Aug/CVE-2018-6952

CVE-2018-6952

Aug 11, 2020
microsoft2018-FEB/CVE-2018-6952Important

A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6.

Feb 13, 2018
redhatCVE-2018-6952Low

patch: Double free of memory in pch.c:another_hunk() causes a crash

Feb 3, 2018

References

access.redhat.com / errata/RHSA-2019:2033
savannah.gnu.org / bugs/index.php
Vendor Advisory
security.gentoo.org / glsa/201904-17
securityfocus.com / bid/103047
Third Party AdvisoryVDB Entry