A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6.
Priority MEDIUM 44CWE-415Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 fixed, 2 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.
Summary
A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6.
Why it matters now
EPSS 0.0819 94th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 4 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2019:2033 Released 2019-08-06 · Red Hat rating Lowpatch security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) patch-2.7.1-11.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) patch-2.7.1-11.el7
- Red Hat Enterprise Linux Server (v. 7) patch-2.7.1-11.el7
- Red Hat Enterprise Linux Workstation (v. 7) patch-2.7.1-11.el7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2019:2033 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2019:2033 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:2033 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:2033 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2018-6952
- 2026-10-03 Alias added: GHSA-ffqc-f68h-qq8w
References
More GNU Patch vulnerabilities
- TI-2015-01271 Directory traversal vulnerability in GNU patch versions which support Git-style patching… CVSS 3.0HIGH 7.5
- TI-2018-05075 An issue was discovered in GNU patch through 2.7.6. CVSS 3.0HIGH 7.5
- TI-2018-15808 GNU Patch version 2.7.6 contains an input validation vulnerability when processing patch… CVSS 3.0HIGH 7.8
- TI-2019-10248 GNU patch through 2.7.6 is vulnerable to OS shell command injection that can be exploited… CVSS 3.0HIGH 7.8
- TI-2018-14931 do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a… CVSS 3.0HIGH 7.8
- TI-2015-01272 A Directory Traversal vulnerability exists in the GNU patch before 2.7.4. CVSS 3.1HIGH 7.5
Sources
- CVE-2018-6952 · CVE Program
- CVE-2018-6952 · NVD
- FIRST EPSS
- GHSA-ffqc-f68h-qq8w · GitHub Advisory Database · CC BY 4.0
- CVE-2018-6952 · Red Hat security data · CC BY 4.0
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