{"id":82497,"date":"2026-07-24T12:46:25","date_gmt":"2026-07-24T09:16:25","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-56391-out-of-bounds-read-in-gnu-coreutils\/"},"modified":"2026-07-24T12:46:25","modified_gmt":"2026-07-24T09:16:25","slug":"cve-2026-56391-out-of-bounds-read-in-gnu-coreutils","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-56391-out-of-bounds-read-in-gnu-coreutils\/","title":{"rendered":"CVE-2026-56391 &#8211; Out\u2011of\u2011bounds Read in GNU coreutils"},"content":{"rendered":"<p>CVE ID :CVE-2026-56391<\/p>\n<p>  Published : July 24, 2026, 9:16 a.m. | 33\u00a0minutes ago<\/p>\n<p>  Description :GNU coreutils uniq is vulnerable to an out\u2011of\u2011bounds read due to incorrect handling of multibyte input when the -w (&#8211;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.<br \/>\nThis incorrect length is later used in a memcmp operation, causing reads beyond the allocated buffer when processing crafted multibyte input.<\/p>\n<p>When running GNU coreutils uniq with attacker-provided arguments, this behavior leads to a crash and potential adjacent heap memory exposure.<\/p>\n<p>This issue has been fixed in the commit d64e35a8a4c0e4608321433e0d84d917e4e36371.<\/p>\n<p>  Severity: 4.6 | MEDIUM<\/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-2026-56391 Published : July 24, 2026, 9:16 a.m. | 33\u00a0minutes ago Description :GNU coreutils uniq is vulnerable to an out\u2011of\u2011bounds read due to incorrect handling of multibyte input when the -w (&#8211;check-chars) option is used. The find_field() function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing &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-82497","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82497","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=82497"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82497\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}