ubuntu-cve-2025-49795
Vulnerability from osv_ubuntu
Published
2025-06-16 16:15
Modified
2026-04-22 07:56
Summary
Details

A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libxml2-16",
            "binary_version": "2.14.5+dfsg-0.2"
          },
          {
            "binary_name": "libxml2-utils",
            "binary_version": "2.14.5+dfsg-0.2"
          },
          {
            "binary_name": "python3-libxml2",
            "binary_version": "2.14.5+dfsg-0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libxml2",
        "purl": "pkg:deb/ubuntu/libxml2@2.14.5+dfsg-0.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.14.5+dfsg-0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.7+dfsg+really2.9.14-0.4",
        "2.12.7+dfsg+really2.9.14-0.4ubuntu0.1",
        "2.12.7+dfsg+really2.9.14-1",
        "2.14.3+dfsg-0exp1",
        "2.14.3+dfsg-0exp2",
        "2.14.3+dfsg-0exp3",
        "2.14.4+dfsg-0exp1",
        "2.14.5+dfsg-0exp1",
        "2.14.5+dfsg-0exp2",
        "2.14.5+dfsg-0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.",
  "id": "UBUNTU-CVE-2025-49795",
  "modified": "2026-04-22T07:56:54Z",
  "published": "2025-06-16T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-49795"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-49795"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/issues/932"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/issues/932"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/commit/499bcb78ab389f60c2fd634ce410d4bb85c18765"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/commit/24d7e15914588cb45e7fb41cbe4fcf785e1a4861"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/commit/c24909ba2601848825b49a60f988222da3019667"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-49795"
  ]
}



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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

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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.