FKIE_CVE-2025-26597

Vulnerability from fkie_nvd - Published: 2025-02-25 16:15 - Updated: 2026-06-29 21:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2500Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2502Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2861Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2862Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2865Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2866Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2873Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2874Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2875Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2879Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:2880Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:3976
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:7163
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:7165
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:7458
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2025-26597Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2345255Issue Tracking
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/06/02/1
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html
Impacted products
Vendor Product Version
tigervnc tigervnc -
x.org x_server *
x.org xwayland *
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
To clipboard 

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size."
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    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla de desbordamiento de b\u00fafer en X.Org y Xwayland. Si se llama a XkbChangeTypesOfKey() con un grupo 0, cambiar\u00e1 el tama\u00f1o de la tabla de s\u00edmbolos de teclas a 0, pero dejar\u00e1 las acciones de teclas sin cambios. Si luego se llama a la misma funci\u00f3n con un valor de grupos distinto de cero, esto provocar\u00e1 un desbordamiento de b\u00fafer porque las acciones de teclas tienen un tama\u00f1o incorrecto."
    }
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  "id": "CVE-2025-26597",
  "lastModified": "2026-06-29T21:16:33.970",
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    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2025:3976"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2025:7163"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2025:7165"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2025:7458"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2025-26597"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2345255"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/02/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Secondary"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.