CVE-2026-56392— GNU coreutils 堆缓冲区溢出漏洞
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一、 漏洞 CVE-2026-56392 基础信息
漏洞信息
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Vulnerability Title
Heap-based Buffer Overflow in GNU coreutils
来源: CVE Program / CVE List V5
Vulnerability Description
GNU coreutils unexpand is vulnerable to a heap-based buffer overflow due to an integer overflow during buffer allocation when processing large tab stop (-t) values. The multiplication used to calculate the allocation size can wrap around, resulting in an undersized buffer. When processing crafted input, subsequent writes exceed the allocated memory, leading to an out‑of‑bounds heap write. When running GNU coreutils unexpand with attacker-provided large tab stop (-t) arguments, this behavior leads to a crash and potentially achieve a heap write primitive depending on memory layout. This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-56392 的公开POC
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CVE-2026-56392 补丁与修复 (2)
CVE-2026-56392 安全博客文章 (1)
- 🔗 Vulnerabilities in GNU coreutils software | CERT Polskathird-party-advisory
IV. Related Vulnerabilities
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