Vulnerability-Lookup

OESA-2026-4063 (CVE-2026-18495)

Vulnerability from osv_openeuler – Published: 2026-09-25 01:27 – Updated: 2026-09-25 01:27 – Source website

Summary

libtiff security update

Details

This provides support for the Tag Image File Format (TIFF), a widely used format for storing image data. The latest version of the TIFF specification is available on-line in several different formats.And contains command-line programs for manipulating TIFF format image files using the libtiff library.

Security Fix(es):

A flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the tiff2pdf utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit StripByteCounts value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.(CVE-2026-18495)

Severity

6.1 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-18495	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libtiff-4.3.0-41.oe2003sp4.aarch64.rpm",
          "libtiff-debuginfo-4.3.0-41.oe2003sp4.aarch64.rpm",
          "libtiff-debugsource-4.3.0-41.oe2003sp4.aarch64.rpm",
          "libtiff-devel-4.3.0-41.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "libtiff-help-4.3.0-41.oe2003sp4.noarch.rpm"
        ],
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          "libtiff-4.3.0-41.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "libtiff-4.3.0-41.oe2003sp4.x86_64.rpm",
          "libtiff-debuginfo-4.3.0-41.oe2003sp4.x86_64.rpm",
          "libtiff-debugsource-4.3.0-41.oe2003sp4.x86_64.rpm",
          "libtiff-devel-4.3.0-41.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "libtiff",
        "purl": "pkg:rpm/openEuler/libtiff\u0026distro=openEuler-20.03-LTS-SP4"
      },
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            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
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    },
    {
      "ecosystem_specific": {
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          "libtiff-debuginfo-4.3.0-55.oe2203sp4.aarch64.rpm",
          "libtiff-debugsource-4.3.0-55.oe2203sp4.aarch64.rpm",
          "libtiff-devel-4.3.0-55.oe2203sp4.aarch64.rpm",
          "libtiff-static-4.3.0-55.oe2203sp4.aarch64.rpm",
          "libtiff-tools-4.3.0-55.oe2203sp4.aarch64.rpm"
        ],
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          "libtiff-debuginfo-4.3.0-55.oe2203sp4.x86_64.rpm",
          "libtiff-debugsource-4.3.0-55.oe2203sp4.x86_64.rpm",
          "libtiff-devel-4.3.0-55.oe2203sp4.x86_64.rpm",
          "libtiff-static-4.3.0-55.oe2203sp4.x86_64.rpm",
          "libtiff-tools-4.3.0-55.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "libtiff",
        "purl": "pkg:rpm/openEuler/libtiff\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.0-55.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
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          "libtiff-debuginfo-4.6.0-13.oe2403sp1.aarch64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp1.aarch64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp1.aarch64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp1.aarch64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "libtiff-help-4.6.0-13.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "libtiff-4.6.0-13.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "libtiff-4.6.0-13.oe2403sp1.x86_64.rpm",
          "libtiff-debuginfo-4.6.0-13.oe2403sp1.x86_64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp1.x86_64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp1.x86_64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp1.x86_64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "libtiff",
        "purl": "pkg:rpm/openEuler/libtiff\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6.0-13.oe2403sp1"
            }
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
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          "libtiff-debuginfo-4.6.0-13.oe2403sp3.aarch64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp3.aarch64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp3.aarch64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp3.aarch64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "libtiff-help-4.6.0-13.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "libtiff-4.6.0-13.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "libtiff-4.6.0-13.oe2403sp3.x86_64.rpm",
          "libtiff-debuginfo-4.6.0-13.oe2403sp3.x86_64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp3.x86_64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp3.x86_64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp3.x86_64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "libtiff",
        "purl": "pkg:rpm/openEuler/libtiff\u0026distro=openEuler-24.03-LTS-SP3"
      },
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        }
      ]
    },
    {
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          "libtiff-4.6.0-13.oe2403sp4.aarch64.rpm",
          "libtiff-debuginfo-4.6.0-13.oe2403sp4.aarch64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp4.aarch64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp4.aarch64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp4.aarch64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "libtiff-help-4.6.0-13.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "libtiff-4.6.0-13.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "libtiff-4.6.0-13.oe2403sp4.x86_64.rpm",
          "libtiff-debuginfo-4.6.0-13.oe2403sp4.x86_64.rpm",
          "libtiff-debugsource-4.6.0-13.oe2403sp4.x86_64.rpm",
          "libtiff-devel-4.6.0-13.oe2403sp4.x86_64.rpm",
          "libtiff-static-4.6.0-13.oe2403sp4.x86_64.rpm",
          "libtiff-tools-4.6.0-13.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "libtiff",
        "purl": "pkg:rpm/openEuler/libtiff\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6.0-13.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "This  provides support for the Tag Image File Format (TIFF), a widely used format for storing image data. The latest version of the TIFF specification is available on-line in several different formats.And contains command-line programs for manipulating TIFF format image files using the libtiff library.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the `tiff2pdf` utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit `StripByteCounts` value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.(CVE-2026-18495)",
  "id": "OESA-2026-4063",
  "modified": "2026-09-25T01:27:57Z",
  "published": "2026-09-25T01:27:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4063"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18495"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libtiff security update",
  "upstream": [
    "CVE-2026-18495"
  ]
}

CVE-2026-18495 (GCVE-0-2026-18495)

Vulnerability from cvelistv5 – Published: 2026-09-11 17:41 – Updated: 2026-09-11 17:56

Title

Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough

Summary

A flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the `tiff2pdf` utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit `StripByteCounts` value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 17:56 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

redhat redhat root Scorecard

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:53467	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18495	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2531414	issue-trackingx_refsource_REDHAT
https://gitlab.com/libtiff/libtiff/-/merge_requests/729
https://gitlab.com/libtiff/libtiff/-/tree/67fd283…

Impacted products

12 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 4.7.2-2.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Ceph Storage 4	cpe:/a:redhat:ceph_storage:4
Red Hat	Red Hat Ceph Storage 6	cpe:/a:redhat:ceph_storage:6
Red Hat	Red Hat Ceph Storage 7	cpe:/a:redhat:ceph_storage:7
Red Hat	Red Hat Ceph Storage 8	cpe:/a:redhat:ceph_storage:8
Red Hat	Red Hat Ceph Storage 9	cpe:/a:redhat:ceph_storage:9
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
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1

Date Public

2026-08-20 00:00

Credits

Red Hat would like to thank Jinbao Chen for reporting this issue.

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
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                "id": "CVE-2026-18495",
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        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:53467",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:53467"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-18495"
        },
        {
          "name": "RHBZ#2531414",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531414"
        },
        {
          "url": "https://gitlab.com/libtiff/libtiff/-/merge_requests/729"
        },
        {
          "url": "https://gitlab.com/libtiff/libtiff/-/tree/67fd283d276f09db54dc39b9ef7b979d4b45c4b1"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-24T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-08-20T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-122: Heap-based Buffer Overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-18495",
    "datePublished": "2026-09-11T17:41:36.400Z",
    "dateReserved": "2026-07-31T15:34:43.453Z",
    "dateUpdated": "2026-09-11T17:56:57.498Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

Action not permitted

OESA-2026-4063 (CVE-2026-18495)

CVE-2026-18495 (GCVE-0-2026-18495)

Tags

Sightings

Nomenclature

Related by attack behaviour