Vulnerability-Lookup

GHSA-XP56-6525-9CHF

Vulnerability from github – Published: 2026-01-16 00:30 – Updated: 2026-01-20 18:31

Details

Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-0915"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-15T22:16:12Z",
    "severity": "HIGH"
  },
  "details": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.",
  "id": "GHSA-xp56-6525-9chf",
  "modified": "2026-01-20T18:31:55Z",
  "published": "2026-01-16T00:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0915"
    },
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      "type": "WEB",
      "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
    },
    {
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      "url": "http://www.openwall.com/lists/oss-security/2026/01/16/6"
    }
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-0915 (GCVE-0-2026-0915)

Vulnerability from cvelistv5 – Published: 2026-01-15 22:08 – Updated: 2026-01-20 16:03

Title

getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-20 16:03 UTC

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=33802
http://www.openwall.com/lists/oss-security/2026/01/16/6

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.0 , ≤ 2.42 (custom)

Credits

Igor Morgenstern, Aisle Research

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JSON

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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.