CVE-2026-66485

GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. 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. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial of service. This issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9

CVSS

No CVSS.

References

Link	Resource
https://cert.pl/en/posts/2026/08/CVE-2026-66484
https://git.savannah.gnu.org/cgit/cpio.git

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 11:17

Updated : 2026-08-28 15:26

NVD link : CVE-2026-66485

Mitre link : CVE-2026-66485

CVE.ORG link : CVE-2026-66485

JSON object : View

Products Affected

No product.

CWE

CWE-789

Memory Allocation with Excessive Size Value

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