Vulnerability-Lookup

GHSA-JJ2G-XQ7W-GF88

Vulnerability from github – Published: 2026-04-20 21:31 – Updated: 2026-04-21 21:31

Details

The obsolete nis_local_principal function in the GNU C Library version 2.43 and older may overflow a buffer in the data section, which could allow an attacker to spoof a crafted response to a UDP request generated by this function and overwrite neighboring static data in the requesting application.

NIS support is obsolete and has been deprecated in the GNU C Library since version 2.26 and is only maintained for legacy usage. Applications should port away from NIS to more modern identity and access management services.

Severity ?

9.1 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-5358"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-120"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-20T21:16:36Z",
    "severity": "CRITICAL"
  },
  "details": "The obsolete nis_local_principal function in the GNU C Library version 2.43 and older may overflow a buffer in the data section, which could allow an attacker to spoof a crafted response to a UDP request generated by this function and overwrite neighboring static data in the requesting application.\n\nNIS support is obsolete and has been deprecated in the GNU C Library since version 2.26 and is only maintained for legacy usage. Applications should port away from NIS to more modern identity and access management services.",
  "id": "GHSA-jj2g-xq7w-gf88",
  "modified": "2026-04-21T21:31:21Z",
  "published": "2026-04-20T21:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5358"
    },
    {
      "type": "WEB",
      "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=34067"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-5358 (GCVE-0-2026-5358)

Vulnerability from cvelistv5 – Published: 2026-04-20 20:37 – Updated: 2026-04-22 13:04

REJECTED: CVE-2026-5358 is rejected for two reasons. Firstly it has been discovered that no NIS+ client or server was ever released for any Linux-based OS distributions and as such this makes the API provisional and unused. Secondly it has been discovered that the NIS+ cold start cache (/var/nis/NIS_COLD_START) cannot be bypassed and as such the API can only be called with a trusted server from the pre-populated cache. The use of a trusted server means no trust boundary is crossed and this is therefore considered a normal bug.

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{
  "containers": {
    "cna": {
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:04:20.656Z",
        "orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
        "shortName": "glibc"
      },
      "rejectedReasons": [
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          "value": "REJECTED: CVE-2026-5358 is rejected for two reasons. Firstly it has been\u00a0discovered that no NIS+ client or server was ever released for any\u00a0Linux-based OS distributions and as such this makes the API provisional\u00a0and unused.  Secondly it has been discovered that the NIS+ cold start\u00a0cache (/var/nis/NIS_COLD_START) cannot be bypassed and as such the API\u00a0can only be called with a trusted server from the pre-populated cache.\u00a0The use of a trusted server means no trust boundary is crossed and this\u00a0is therefore considered a normal bug."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
    "assignerShortName": "glibc",
    "cveId": "CVE-2026-5358",
    "datePublished": "2026-04-20T20:37:23.178Z",
    "dateRejected": "2026-04-22T13:04:20.656Z",
    "dateReserved": "2026-04-01T17:07:51.437Z",
    "dateUpdated": "2026-04-22T13:04:20.656Z",
    "state": "REJECTED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-JJ2G-XQ7W-GF88

CVE-2026-5358 (GCVE-0-2026-5358)

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