GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the…
Priority LOW 27CWE-415Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.
Summary
GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.
Why it matters now
EPSS 0.01019 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Deferred Red Hat: fix deferred
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
No fixed version listed by the sources yet.
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: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-20633
- 2026-10-03 Alias added: GHSA-w88p-xvmw-fxgg
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-2018-05076 A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6. 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
Sources
- CVE-2019-20633 · CVE Program
- CVE-2019-20633 · NVD
- FIRST EPSS
- GHSA-w88p-xvmw-fxgg · GitHub Advisory Database · CC BY 4.0
- CVE-2019-20633 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences