{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Moderate" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for coreutils is now available for Red Hat Enterprise Linux 8.\n\nRed 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 the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages.\n\nSecurity Fix(es):\n\n* coreutils: Heap Buffer Under-Read in GNU Coreutils sort via Key Specification (CVE-2025-5278)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2026:69964", "url": "https://access.redhat.com/errata/RHSA-2026:69964" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "2368764", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368764" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_69964.json" } ], "title": "Red Hat Security Advisory: coreutils security update", "tracking": { "current_release_date": "2026-09-22T15:41:29+00:00", "generator": { "date": "2026-09-22T15:41:29+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.4.0" } }, "id": "RHSA-2026:69964", "initial_release_date": "2026-09-22T11:22:56+00:00", "revision_history": [ { "date": "2026-09-22T11:22:56+00:00", "number": "1", "summary": "Initial version" }, { "date": "2026-09-22T11:22:56+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-09-22T15:41:29+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux BaseOS (v. 8)", "product": { "name": "Red Hat Enterprise Linux BaseOS (v. 8)", "product_id": 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The sort utility's begfield() function is vulnerable to a heap buffer under-read. The program may access memory outside the allocated buffer if a user runs a crafted command using the traditional key format. A malicious input could lead to a crash or leak sensitive data.", "title": "Vulnerability description" }, { "category": "summary", "text": "coreutils: Heap Buffer Under-Read in GNU Coreutils sort via Key Specification", "title": "Vulnerability summary" }, { "category": "other", "text": "The severity of this issue is considered Moderate rather than Critical because successful exploitation requires the use of the traditional key specification syntax with an exceptionally large character position value, which is uncommon in typical usage. Although the vulnerability can lead to a heap buffer overflow resulting in a read one byte before the allocated buffer, it does not enable code execution, privilege escalation, or direct compromise of data confidentiality or integrity. The impact is therefore primarily limited to potential service disruption due to application crashes.\n\nFurthermore, default RHEL configurations such as SELinux enforcement, ASLR, and memory protections reduce the likelihood of exploitation and limit the scope of any resulting impact. These safeguards, along with typical system usage patterns that do not commonly invoke the vulnerable code path, restrict exploitability in default and hardened environments. Consequently, the vulnerability’s overall security impact is mitigated compared to flaws that allow immediate code execution or broader compromise across system components.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-0:8.30-21.el8_10.aarch64", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-0:8.30-21.el8_10.ppc64le", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-0:8.30-21.el8_10.s390x", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-0:8.30-21.el8_10.src", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-0:8.30-21.el8_10.x86_64", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-debuginfo-0:8.30-21.el8_10.aarch64", "BaseOS-8.10.0.Z.MAIN.EUS:coreutils-debuginfo-0:8.30-21.el8_10.ppc64le", 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