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      "text" : "An update for libtiff is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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      "text" : "The libtiff packages contain a library of functions for manipulating Tagged Image File Format (TIFF) files.\n\nSecurity Fix(es):\n\n* libtiff: TIFFRasterScanlineSize64 produce too-big size and could cause OOM (CVE-2023-52355)\n\n* libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image (CVE-2026-12912)\n\nBug Fix(es) and Enhancement(s):\n\n* Reintroduce the `tiffcp -i` option [rhel-10.0.z] (JIRA:RHEL-185417)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_49671.json"
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    "title" : "Red Hat Security Advisory: libtiff security, bug fix, and enhancement update",
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    "cve" : "CVE-2023-52355",
    "cwe" : {
      "id" : "CWE-787",
      "name" : "Out-of-bounds Write"
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    "discovery_date" : "2023-11-24T00:00:00+00:00",
    "ids" : [ {
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      "text" : "2251326"
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      "category" : "description",
      "text" : "An out-of-memory flaw was found in libtiff that could be triggered by passing a crafted tiff file to the TIFFRasterScanlineSize64() API. This flaw allows a remote attacker to cause a denial of service via a crafted input with a size smaller than 379 KB.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libtiff: TIFFRasterScanlineSize64 produce too-big size and could cause OOM",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "The identified out-of-memory vulnerability in libtiff, triggered by a crafted TIFF file passed to the TIFFRasterScanlineSize64() API, presents a moderate severity concern rather than a important one due to several factors. Primarily, the exploit requires the crafted input to be smaller than 379 KB, imposing a limitation on the potential impact and reducing the likelihood of successful exploitation in practical scenarios. Furthermore, the nature of the vulnerability is limited to denial-of-service attacks, which, although disruptive, do not inherently pose a direct risk of data compromise or system compromise. However, it's important to acknowledge that denial-of-service attacks can still have significant operational implications, particularly in environments reliant on continuous availability.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2023-52355"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2251326",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2251326"
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      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2023-52355",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2023-52355"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2023-52355",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-52355"
    }, {
      "category" : "external",
      "summary" : "https://gitlab.com/libtiff/libtiff/-/issues/621",
      "url" : "https://gitlab.com/libtiff/libtiff/-/issues/621"
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    "release_date" : "2023-11-03T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-08-03T13:40:08+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    "threats" : [ {
      "category" : "impact",
      "details" : "Moderate"
    } ],
    "title" : "libtiff: TIFFRasterScanlineSize64 produce too-big size and could cause OOM"
  }, {
    "acknowledgments" : [ {
      "names" : [ "Ariel Schön" ]
    } ],
    "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's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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      "summary" : "RHBZ#2492871",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492871"
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      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-12912",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-12912"
    }, {
      "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" : "2026-08-03T13:40:08+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:49671"
    }, {
      "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.",
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    "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"
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    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image"
  } ]
}