RHSA-2026:34890

Vulnerability from csaf_redhat - Published: 2026-07-02 12:05 - Updated: 2026-10-02 02:21
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: libtiff: * libtiff-4.7.1-2.4.hum1 (aarch64, x86_64) * libtiff-devel-4.7.1-2.4.hum1 (aarch64, x86_64) * libtiff-static-4.7.1-2.4.hum1 (aarch64, x86_64) * libtiff-tools-4.7.1-2.4.hum1 (aarch64, x86_64) * libtiff-4.7.1-2.4.hum1.src (src) Security Fix(es): libtiff: * CVE-2026-12912
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-12912

A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).

7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE-122 - Heap-based Buffer Overflow
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important
References
Acknowledgments
Ariel Schön
To clipboard 

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        "text": "This update includes the following RPMs:\n\nlibtiff:\n  * libtiff-4.7.1-2.4.hum1 (aarch64, x86_64)\n  * libtiff-devel-4.7.1-2.4.hum1 (aarch64, x86_64)\n  * libtiff-static-4.7.1-2.4.hum1 (aarch64, x86_64)\n  * libtiff-tools-4.7.1-2.4.hum1 (aarch64, x86_64)\n  * libtiff-4.7.1-2.4.hum1.src (src)\n\nSecurity Fix(es):\n\nlibtiff:\n  * CVE-2026-12912",
        "title": "Details"
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Ariel Sch\u00f6n"
          ]
        }
      ],
      "cve": "CVE-2026-12912",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2026-06-25T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2492871"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important heap-based buffer overflow in libtiff affecting applications that explicitly configure the library to decode Pixarlog-compressed TIFF images using the PIXARLOGDATAFMT_8BITABGR output format with SamplesPerPixel == 3. Standard image reading functions, such as TIFFReadRGBAImage, are not directly impacted as they do not typically select this specific format. Exploitation requires processing a specially crafted TIFF image under these specific conditions.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@src",
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-12912",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12912"
        },
        {
          "category": "external",
          "summary": "https://gitlab.com/libtiff/libtiff/-/merge_requests/873",
          "url": "https://gitlab.com/libtiff/libtiff/-/merge_requests/873"
        },
        {
          "category": "external",
          "summary": "https://gitlab.com/libtiff/libtiff/-/work_items/824",
          "url": "https://gitlab.com/libtiff/libtiff/-/work_items/824"
        }
      ],
      "release_date": "2026-04-16T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T12:05:48+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@aarch64",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@src",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:34890"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, applications processing untrusted TIFF images should avoid explicitly configuring `PIXARLOGDATAFMT_8BITABGR` when decoding PixarLog-compressed TIFF images with three samples per pixel. This specific combination of output format and samples per pixel is required to trigger the heap-based buffer overflow.",
          "product_ids": [
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@aarch64",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@src",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@aarch64",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@src",
            "Red Hat Hardened Images:libtiff-0:4.7.1-2.4.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image"
    }
  ]
}



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