coreutils: GNU coreutils uniq: Denial of Service and information disclosure via out-of-bounds read with multibyte input

A flaw was found in GNU coreutils uniq. When processing specially crafted multibyte input with the --check-chars option, an attacker can trigger an out-of-bounds read. This vulnerability can lead to a denial of service DoS due to an application crash and potentially expose sensitive information...

Moderate: Red Hat Security Advisory: coreutils security update

An update for coreutils is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

coreutils security update

9.5-8.0.1.el102.1 - clean up empty file if cp is failed Orabug 15973168 9.5-8.1 - uniq: fix CVE-2026-56391 RHEL-216794 - fix read overrun with -w - unexpand: fix CVE-2026-56392 and related crashes RHEL-216784 - fix direct.sh and unexpand/mb.sh tests - fix unexpand/expand crash on invalid multibyt...

USN-8697-1: GNU Core Utilities vulnerabilities

It was discovered that GNU Core Utilities sort had a heap buffer under-read in its begfield function. A local attacker could possibly use this issue to cause GNU Core Utilities to crash, resulting in a denial of service, or obtain sensitive information. CVE-2025-5278 It was discovered that GNU Co...

JLSEC-2026-1195 GNU coreutils uniq is vulnerable to an out‑of‑bounds read due to incorrect handling of multibyte...

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

SUSE CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391

A flaw was found in GNU coreutils uniq. When processing specially crafted multibyte input with the --check-chars option, an attacker can trigger an out-of-bounds read. This vulnerability can lead to a denial of service DoS due to an application crash and potentially expose sensitive information...

Linux Distros Unpatched Vulnerability : CVE-2026-56391

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - GNU coreutils uniq is vulnerable to an outofbounds read due to incorrect handling of multibyte input when the -w --check-chars option is used. The findfield...

CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

DEBIAN-CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

UBUNTU-CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391 Out‑of‑bounds Read in GNU coreutils

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

EUVD-2026-48524

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391 Out‑of‑bounds Read in GNU coreutils

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391

The CVE-2026-56391 issue affects GNU coreutils, specifically the uniq utility, where out-of-bounds reads can occur when processing multibyte input with -w/--check-chars. The root cause is in find_field(), which fails to advance the input pointer correctly, inflating the computed length and causin...

CVE-2026-56391 Out‑of‑bounds Read in GNU coreutils

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

CVE-2026-56391

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 findfield function miscalculates the byte length of characters by repeatedly processing a fixed pointer instead of advancing through the input,...

PT-2026-64259

Name of the Vulnerable Software and Affected Versions GNU coreutils affected versions not specified Description GNU coreutils uniq contains an out-of-bounds read issue caused by incorrect handling of multibyte input when the -w --check-chars option is used. The find field function miscalculates t...