{
  "threat_severity" : "Important",
  "public_date" : "2026-04-16T00:00:00Z",
  "bugzilla" : {
    "description" : "libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image",
    "id" : "2492871",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492871"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-122",
  "details" : [ "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).", "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)." ],
  "statement" : "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.",
  "acknowledgement" : "Red Hat would like to thank Ariel Schön for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-20T00:00:00Z",
    "advisory" : "RHSA-2026:41892",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "libtiff-0:4.6.0-8.el10_2.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-21T00:00:00Z",
    "advisory" : "RHSA-2026:42668",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "libtiff-0:4.4.0-18.el9_8.1"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-07-02T00:00:00Z",
    "advisory" : "RHSA-2026:34890",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "libtiff-main-4.7.1-2.4.hum1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "libtiff",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "compat-libtiff3",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "libtiff",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "compat-libtiff3",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "libtiff",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "mingw-libtiff",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "fix_state" : "Not affected",
    "package_name" : "boost",
    "cpe" : "cpe:/a:redhat:hummingbird:1"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-12912\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-12912\nhttps://gitlab.com/libtiff/libtiff/-/merge_requests/873\nhttps://gitlab.com/libtiff/libtiff/-/work_items/824" ],
  "name" : "CVE-2026-12912",
  "mitigation" : {
    "value" : "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.",
    "lang" : "en:us"
  },
  "csaw" : false
}