CVE-2026-56391— GNU coreutils 越界读取漏洞
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一、 漏洞 CVE-2026-56391 基础信息
漏洞信息
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Vulnerability Title
Out‑of‑bounds Read in GNU coreutils
来源: CVE Program / CVE List V5
Vulnerability Description
GNU coreutils uniq is vulnerable to an out‑of‑bounds read due to incorrect handling of multibyte input when the -w (--check-chars) option is used. The find_field() function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input, resulting in an inflated length value. This incorrect length is later used in a memcmp operation, causing reads beyond the allocated buffer when processing crafted multibyte input. When running GNU coreutils uniq with attacker-provided arguments, this behavior leads to a crash and potential adjacent heap memory exposure. This issue has been fixed in the commit d64e35a8a4c0e4608321433e0d84d917e4e36371.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-56391 的公开POC
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CVE-2026-56391 补丁与修复 (2)
CVE-2026-56391 安全博客文章 (1)
- 🔗 Vulnerabilities in GNU coreutils software | CERT Polskathird-party-advisory
IV. Related Vulnerabilities
V. Comments for CVE-2026-56391
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