CVE-2026-71267

9.8 CRITICALpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: The flaw in microtar allows an attacker to overwrite the 100-byte field of a stack-allocated structure via a long entry name, leading to potential buffer overflow and execution of arbitrary code.
Exploitability: Exploitation is relatively straightforward given the lack of input validation, and requires an attacker to supply a long entry name.
Blast radius: If exploited, this flaw could lead to full system compromise, as it allows for arbitrary code execution.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the latest version of microtar, or apply the specific patch provided by the vendor.

rcebuffer-overflowstack-overflowarbitrary-code-execution

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

microtar's mtar_write_file_header and mtar_write_dir_header functions (src/microtar.c) copy a caller-supplied entry name into the 100-byte field of a stack-allocated mtar_header_t via strcpy(h.name, name), with no check that strlen(name) is less than 100 before the copy.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-121

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.