{"id":82496,"date":"2026-07-24T12:46:25","date_gmt":"2026-07-24T09:16:25","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-56392-heap-based-buffer-overflow-in-gnu-coreutils\/"},"modified":"2026-07-24T12:46:25","modified_gmt":"2026-07-24T09:16:25","slug":"cve-2026-56392-heap-based-buffer-overflow-in-gnu-coreutils","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-56392-heap-based-buffer-overflow-in-gnu-coreutils\/","title":{"rendered":"CVE-2026-56392 &#8211; Heap-based Buffer Overflow in GNU coreutils"},"content":{"rendered":"<p>CVE ID :CVE-2026-56392<\/p>\n<p>  Published : July 24, 2026, 9:16 a.m. | 33\u00a0minutes ago<\/p>\n<p>  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.<br \/>\nWhen processing crafted input, subsequent writes exceed the allocated memory, leading to an out\u2011of\u2011bounds heap write.<\/p>\n<p>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.<\/p>\n<p>This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d<\/p>\n<p>  Severity: 1.8 | LOW<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-56392 Published : July 24, 2026, 9:16 a.m. | 33\u00a0minutes ago 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. &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82496","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82496"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82496\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}