Vulnerability-Lookup

UBUNTU-CVE-2026-4367 (CVE-2026-4367)

Vulnerability from osv_ubuntu – Published: 2026-04-21 13:00 – Updated: 2026-07-23 17:58 – Source website

Details

A flaw was found in libXpm. A local user with low privileges could exploit an Out-of-Bounds Read vulnerability in the xpmNextWord() function by processing a specially crafted or very small XPM (X PixMap) image file. This improper validation of file boundaries can cause an internal pointer to read beyond the file's end, leading to application crashes and Denial of Service conditions.

Severity

5.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-4367	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-4367	REPORT
	https://ubuntu.com/security/notices/USN-8600-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libxpm4",
            "binary_version": "1:3.5.10-1ubuntu0.1+esm2"
          },
          {
            "binary_name": "xpmutils",
            "binary_version": "1:3.5.10-1ubuntu0.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libxpm",
        "purl": "pkg:deb/ubuntu/libxpm@1:3.5.10-1ubuntu0.1+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.5.10-1",
        "1:3.5.10-1ubuntu0.1",
        "1:3.5.10-1ubuntu0.1+esm1",
        "1:3.5.10-1ubuntu0.1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
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          {
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          {
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          },
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          },
          {
            "binary_name": "motif-clients",
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      },
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          ],
          "type": "ECOSYSTEM"
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      ]
    },
    {
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      },
      "ranges": [
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        }
      ],
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libxpm4",
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          },
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            "binary_name": "xpmutils",
            "binary_version": "1:3.5.12-1ubuntu0.20.04.2"
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      },
      "package": {
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        "name": "libxpm",
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      },
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      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmotif-common",
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          },
          {
            "binary_name": "libmrm4",
            "binary_version": "2.3.8-2build1"
          },
          {
            "binary_name": "libuil4",
            "binary_version": "2.3.8-2build1"
          },
          {
            "binary_name": "libxm4",
            "binary_version": "2.3.8-2build1"
          },
          {
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          },
          {
            "binary_name": "uil",
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      },
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    },
    {
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          {
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    {
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          },
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            "binary_version": "1:3.5.17-1ubuntu0.26.04.1"
          }
        ]
      },
      "package": {
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        "name": "libxpm",
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmotif-common",
            "binary_version": "2.3.8-5build1"
          },
          {
            "binary_name": "libmrm4",
            "binary_version": "2.3.8-5build1"
          },
          {
            "binary_name": "libuil4",
            "binary_version": "2.3.8-5build1"
          },
          {
            "binary_name": "libxm4",
            "binary_version": "2.3.8-5build1"
          },
          {
            "binary_name": "mwm",
            "binary_version": "2.3.8-5build1"
          },
          {
            "binary_name": "uil",
            "binary_version": "2.3.8-5build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "motif",
        "purl": "pkg:deb/ubuntu/motif@2.3.8-5build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.8-5",
        "2.3.8-5build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in libXpm. A local user with low privileges could exploit an Out-of-Bounds Read vulnerability in the `xpmNextWord()` function by processing a specially crafted or very small XPM (X PixMap) image file. This improper validation of file boundaries can cause an internal pointer to read beyond the file\u0027s end, leading to application crashes and Denial of Service conditions.",
  "id": "UBUNTU-CVE-2026-4367",
  "modified": "2026-07-23T17:58:23Z",
  "published": "2026-04-21T13:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-4367"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-4367"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8600-1"
    }
  ],
  "related": [
    "USN-8600-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-4367"
  ]
}

CVE-2026-4367 (GCVE-0-2026-4367)

Vulnerability from cvelistv5 – Published: 2026-06-16 16:50 – Updated: 2026-07-28 09:33

Title

Libxpm: libxpm: denial of service via out-of-bounds read in xpm file parsing

Summary

A flaw was found in libXpm. A local user with low privileges could exploit an Out-of-Bounds Read vulnerability in the `xpmNextWord()` function by processing a specially crafted or very small XPM (X PixMap) image file. This improper validation of file boundaries can cause an internal pointer to read beyond the file's end, leading to application crashes and Denial of Service conditions.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-16 18:45 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat CNA under the redhat root

CNA scorecard B 81/100 over 1014 records in the last 180 days details

References

7 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:30354	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:47072	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4367	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2448984	issue-trackingx_refsource_REDHAT
https://gitlab.freedesktop.org/xorg/lib/libxpm/-/…
https://seclists.org/oss-sec/2026/q2/192
http://www.openwall.com/lists/oss-security/2026/04/21/3

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 3.5.17-7.2.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Hardened Images	Unaffected: 3.5.19-4.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-04-21 13:26

Credits

Red Hat would like to thank Naoki Wakamatsu (JPCERT/CC Vulnerability Coordination Group) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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USN-8600-1 (UBUNTU-CVE-2026-4367)

Vulnerability from osv_ubuntu – Published: 2026-07-23 14:41 – Updated: 2026-07-23 14:41 – Source website

Summary

libxpm vulnerability

Details

Naoki Wakamatsu discovered that libXpm did not properly validate file boundaries when processing XPM image files. An attacker could possibly use this issue to cause libXpm to crash, resulting in a denial of service.

References

URL

Type

	https://ubuntu.com/security/notices/USN-8600-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-4367	REPORT

JSON

To clipboard

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              "id": "CVE-2026-4367",
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                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
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          ],
          "ecosystem": "Ubuntu:22.04:LTS"
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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.

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UBUNTU-CVE-2026-4367 (CVE-2026-4367)

CVE-2026-4367 (GCVE-0-2026-4367)

USN-8600-1 (UBUNTU-CVE-2026-4367)

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