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CVE-2015-8877

Status: ModifiedHigh (7.5)—
Severity7.5High · CVSS 3.0
Exploitation probability3.65 %higher than 89% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function.

CVSS

Base score
7.5
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
3.65 %
Percentile among all scored CVEs
89
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Libgd — LibgdPHP — PHP

CWEs

References

Show 14 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2015-8877",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": true,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
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  ],
  "published": "2016-05-22T01:59:09.023",
  "references": [
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2750.html",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.debian.org/security/2016/dsa-3587",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.php.net/ChangeLog-5.php",
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    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2987-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugs.php.net/bug.php?id=70064",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/libgd/libgd/commit/4751b606fa38edc456d627140898a7ec679fcc24",
      "tags": [
        "Patch"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/libgd/libgd/issues/173",
      "tags": [
        "Patch"
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      "source": "cve@mitre.org"
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.debian.org/security/2016/dsa-3587",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.php.net/ChangeLog-5.php",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.ubuntu.com/usn/USN-2987-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://bugs.php.net/bug.php?id=70064",
      "tags": [
        "Exploit"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/libgd/libgd/commit/4751b606fa38edc456d627140898a7ec679fcc24",
      "tags": [
        "Patch"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/libgd/libgd/issues/173",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function."
    },
    {
      "lang": "es",
      "value": "La función gdImageScaleTwoPass en gd_interpolation.c en el GD Graphics Library (también conocido como libgd) en versiones anteriores a 2.2.0, como es utilizado en PHP en versiones anteriores a 5.6.12, usa asignaciones inconsistentes y enfoques libres, lo que permite a atacantes remotos provocar una denegación del servicio (consumo de memoria) a través de una llamada manipulada, según lo demostrado mediante una llamada a la función PHP imagescale."
    }
  ],
  "lastModified": "2026-06-17T00:35:25.457",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B4AB6FB9-E6DD-4FBC-9BC6-594384030CCE",
              "versionEndIncluding": "2.1.1"
            }
          ],
          "operator": "OR"
        }
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    },
    {
      "nodes": [
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              "versionEndIncluding": "5.6.11"
            }
          ],
          "operator": "OR"
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    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}