FKIE_CVE-2026-43996

Vulnerability from fkie_nvd - Published: 2026-05-14 20:17 - Updated: 2026-05-16 01:16
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
References
security-advisories@github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55Exploit, Vendor Advisory
Impacted products
Vendor Product Version
openimageio openimageio *
openimageio openimageio *
openimageio openimageio 3.2.0.0
openimageio openimageio 3.2.0.2
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "90B206C1-E7DB-4175-8077-C76D5C8533AF",
              "versionEndExcluding": "3.0.18.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E1F5BCA2-D6C4-4F7B-8D2A-EBD19A022467",
              "versionEndExcluding": "3.1.13.0",
              "versionStartIncluding": "3.1.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:*",
              "matchCriteriaId": "F43FE0AC-4CFC-485D-8370-37336EB2CEA0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*",
              "matchCriteriaId": "450296D8-74F5-4847-8433-FE3DFB16C58E",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer \u2014 SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0."
    }
  ],
  "id": "CVE-2026-43996",
  "lastModified": "2026-05-16T01:16:16.570",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-14T20:17:07.300",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.