CVE-2026-66485
NVD: GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. NVD: The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. NVD: A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process.
4.6 Severity
MEDIUM EPSS
0.0013 (3) KEV
-
Source-published summary
NVD: GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. NVD: The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. NVD: A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process.
Possible impact
Source describes service availability risk · memory safety review. Possible impact: The affected service may become unavailable or unreliable.
Affected context
Affected product or version requires source confirmation.
Remediation / advisory
Patch confirmed by source text; fixed version context: commit.
Why it matters
Source describes service availability risk · memory safety review. Possible impact: The affected service may become unavailable or unreliable.; CVSS 4.6 (MEDIUM); EPSS percentile 3; not listed in KEV; Patch confirmed by source text; fixed version context: commit; sources: NVD.
What to verify
Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.
Exposure hint
exposure unknown
Impact tags
Urgency reasons
Source-derived note
Summary derived from NVD description; unsafe procedural detail is not shown.
Redaction metadata
- source summary used
- True
- fallback summary used
- False
- unsafe procedural detail present
- false
- raw source displayed
- false
- public summary redacted
- true
Remediation handoff
Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.
Safety note
This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.