Vulnerability-Lookup

rlba-2026:47115

Vulnerability from osv_rocky

Published

2026-07-29 18:00

Modified

2026-07-30 06:09

Summary

Moderate:coreutils bug fix and enhancement update

Details

The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages.

Bug Fix(es) and Enhancement(s):

Fix execution of the downstream tests in coreutils-df-direct.patch and coreutils-i18n.patch [rhel-8.10.z] (JIRA:Rocky Linux-151533)
unexpand: stack overflow with large tabsizes [rhel-8.10.z] (JIRA:Rocky Linux-182699)

Severity

4.4 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLBA-2026:47115	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2506694	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "coreutils",
        "purl": "pkg:rpm/rocky-linux/coreutils?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:8.30-20.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages.\n\nBug Fix(es) and Enhancement(s):\n\n* Fix execution of the downstream tests in coreutils-df-direct.patch and coreutils-i18n.patch [rhel-8.10.z] (JIRA:Rocky Linux-151533)\n\n* unexpand: stack overflow with large tabsizes [rhel-8.10.z] (JIRA:Rocky Linux-182699)",
  "id": "RLBA-2026:47115",
  "modified": "2026-07-30T06:09:21.627450Z",
  "published": "2026-07-29T18:00:52.390223Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLBA-2026:47115"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506694"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate:coreutils bug fix and enhancement update",
  "upstream": [
    "CVE-2026-56392"
  ]
}

CVE-2026-56392 (GCVE-0-2026-56392)

Vulnerability from cvelistv5 – Published: 2026-07-24 07:44 – Updated: 2026-07-24 12:32 X_Open Source

Title

Heap-based Buffer Overflow in GNU coreutils

Summary

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. When processing crafted input, subsequent writes exceed the allocated memory, leading to an out‑of‑bounds heap write. 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. This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d

Severity

1.8 (Low)


                        
                          CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

CERT-PL

References

3 references

URL	Tags
https://cert.pl/en/posts/2026/07/CVE-2026-56391	third-party-advisory
https://git.savannah.gnu.org/cgit/coreutils.git/	product
https://git.savannah.gnu.org/cgit/coreutils.git/c…	patch

Impacted products

1 product

Vendor	Product	Version
GNU	coreutils	Affected: 0 , ≤ 9.11 (custom)

Credits

Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-56392",
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                "role": "CISA Coordinator",
                "timestamp": "2026-07-24T12:32:03.340535Z",
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    "dateReserved": "2026-06-21T11:40:32.790Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

rlba-2026:47115

Vulnerability from osv_rocky

CVE-2026-56392 (GCVE-0-2026-56392)

Tags

Sightings

Nomenclature