Vulnerability-Lookup

ubuntu-cve-2026-17544

Vulnerability from osv_ubuntu

Published

2026-07-30 12:17

Modified

2026-08-10 12:25

Summary

Details

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4. before 8.4.24 and from 8.5. before 8.5.9.

Severity

8.1 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-17544	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-17544	REPORT
	https://github.com/php/php-src/security/advisorie…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache2-mod-php8.3",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "libphp8.3-embed",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-bcmath",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-bz2",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-cgi",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-cli",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-common",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-curl",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-dba",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-enchant",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-fpm",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-gd",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-gmp",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-imap",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-interbase",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-intl",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-ldap",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-mbstring",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-mysql",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-odbc",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-opcache",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-pgsql",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-phpdbg",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-pspell",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-readline",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-snmp",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-soap",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-sqlite3",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-sybase",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-tidy",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-xml",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-xsl",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          },
          {
            "binary_name": "php8.3-zip",
            "binary_version": "8.3.6-0ubuntu0.24.04.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "php8.3",
        "purl": "pkg:deb/ubuntu/php8.3@8.3.6-0ubuntu0.24.04.10?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.3.0-1",
        "8.3.0-1ubuntu1",
        "8.3.4-1",
        "8.3.4-1build1",
        "8.3.6-0maysync1",
        "8.3.6-0ubuntu0.24.04.1",
        "8.3.6-0ubuntu0.24.04.2",
        "8.3.6-0ubuntu0.24.04.3",
        "8.3.6-0ubuntu0.24.04.4",
        "8.3.6-0ubuntu0.24.04.5",
        "8.3.6-0ubuntu0.24.04.6",
        "8.3.6-0ubuntu0.24.04.7",
        "8.3.6-0ubuntu0.24.04.8",
        "8.3.6-0ubuntu0.24.04.9",
        "8.3.6-0ubuntu0.24.04.10"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache2-mod-php8.5",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "libphp8.5-embed",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-bcmath",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-bz2",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-cgi",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-cli",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-common",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-curl",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-dba",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-enchant",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-fpm",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-gd",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-gmp",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-interbase",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-intl",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-ldap",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-litespeed",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-mbstring",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-mysql",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-odbc",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-pgsql",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-phpdbg",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-readline",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-snmp",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-soap",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-sqlite3",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-sybase",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-tidy",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-xml",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-xsl",
            "binary_version": "8.5.4-0ubuntu1.2"
          },
          {
            "binary_name": "php8.5-zip",
            "binary_version": "8.5.4-0ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "php8.5",
        "purl": "pkg:deb/ubuntu/php8.5@8.5.4-0ubuntu1.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.5.2-0ubuntu1",
        "8.5.4-0ubuntu1",
        "8.5.4-0ubuntu1.1",
        "8.5.4-0ubuntu1.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.",
  "id": "UBUNTU-CVE-2026-17544",
  "modified": "2026-08-10T12:25:19Z",
  "published": "2026-07-30T12:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-17544"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-17544"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-17544"
  ]
}

CVE-2026-17544 (GCVE-0-2026-17544)

Vulnerability from cvelistv5 – Published: 2026-07-30 11:22 – Updated: 2026-07-31 03:55

Title

Out-of-bounds write in bccomp() via crafted operand and scale

Summary

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

Severity

8.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 00:00 UTC

CWE

CWE-787 - Out-of-bounds write

Assigner

php mitre root

References

1 reference

URL	Tags
https://github.com/php/php-src/security/advisorie…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
PHP Group	PHP	Affected: 8.4.* , < 8.4.24 (semver) Affected: 8.5.* , < 8.5.9 (semver)

Credits

Recep Asan Ilija Tovilo - The PHP Foundation Saki Takamachi - The PHP Foundation

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-17544",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-30T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-31T03:55:47.261Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "ext-bcmath",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.4.24",
              "status": "affected",
              "version": "8.4.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.9",
              "status": "affected",
              "version": "8.5.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Recep Asan"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Ilija Tovilo - The PHP Foundation"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Saki Takamachi - The PHP Foundation"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAttacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.\u003c/p\u003e"
            }
          ],
          "value": "Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9."
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      ],
      "impacts": [
        {
          "capecId": "CAPEC-100",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-100 Overflow Buffers"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NO",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "exploitMaturity": "UNREPORTED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-30T11:22:24.023Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Out-of-bounds write in bccomp() via crafted operand and scale",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
    "assignerShortName": "php",
    "cveId": "CVE-2026-17544",
    "datePublished": "2026-07-30T11:22:24.023Z",
    "dateReserved": "2026-07-27T10:14:42.318Z",
    "dateUpdated": "2026-07-31T03:55:47.261Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

ubuntu-cve-2026-17544

Vulnerability from osv_ubuntu

CVE-2026-17544 (GCVE-0-2026-17544)

Tags

Sightings

Nomenclature