Vulnerability-Lookup

oesa-2026-2933

Vulnerability from osv_openeuler

Published

2026-07-09 11:11

Modified

2026-08-06 11:11

Summary

libidn security update

Details

GNU Libidn is a fully documented implementation of the Stringprep, Punycode and IDNA 2003 specifications. Libidn's purpose is to encode and decode internationalized domain names.

Security Fix(es):

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.(CVE-2026-57053)

Severity

4.0 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-57053	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libidn-1.41-2.oe2403sp3.aarch64.rpm",
          "libidn-debuginfo-1.41-2.oe2403sp3.aarch64.rpm",
          "libidn-debugsource-1.41-2.oe2403sp3.aarch64.rpm",
          "libidn-devel-1.41-2.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "libidn-help-1.41-2.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "libidn-1.41-2.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "libidn-1.41-2.oe2403sp3.x86_64.rpm",
          "libidn-debuginfo-1.41-2.oe2403sp3.x86_64.rpm",
          "libidn-debugsource-1.41-2.oe2403sp3.x86_64.rpm",
          "libidn-devel-1.41-2.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "libidn",
        "purl": "pkg:rpm/openEuler/libidn\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.41-2.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "GNU Libidn is a fully documented implementation of the Stringprep, Punycode and IDNA 2003 specifications. Libidn\u0026amp;apos;s purpose is to encode and decode internationalized domain names.\r\n\r\nSecurity Fix(es):\n\nGNU libidn before 1.44 is prone to out-of-bounds reads of\u00a0uninitialized memory in the ToUnicode APIs because of mishandling in\u00a0idna_to_unicode_internal. The affected code is not present in libidn2.(CVE-2026-57053)",
  "id": "OESA-2026-2933",
  "modified": "2026-08-06T11:11:50Z",
  "published": "2026-07-09T11:11:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2933"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57053"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libidn security update",
  "upstream": [
    "CVE-2026-57053"
  ]
}

CVE-2026-57053 (GCVE-0-2026-57053)

Vulnerability from cvelistv5 – Published: 2026-06-23 16:40 – Updated: 2026-06-23 17:40

Summary

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.

Severity

4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-23 17:40 UTC

CWE

CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

mitre mitre root

References

2 references

URL	Tags
https://lists.gnu.org/archive/html/help-libidn/20…
https://lists.gnu.org/archive/html/help-libidn/20…

Impacted products

1 product

Vendor	Product	Version
GNU	libidn	Affected: 0 , < 1.44 (custom) cpe:2.3:a:gnu:libidn::::::::

Show details on NVD website

JSON

To clipboard

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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-23T17:40:08.293205Z",
                "version": "2.0.3"
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      "metrics": [
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.