Back
CVE-2016-4538
The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 modifies certain data…
Critical9.8EPSS 6.1%
- Published
- Updated
- Reserved
- Assigned by
- debian
Description
The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 modifies certain data structures without considering whether they are copies of the _zero_, _one_, or _two_ global variable, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 6.1% · top 6.6% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (15)
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:1524 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-201611-22 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://bugs.php.net/bug.php?id=72093 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 90173 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2016:2750 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [oss-security] 20160505 CVE Request: PHP: several issues fixed with 7.0.6, 5.6.21 and 5.5.35 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-3602 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=d650063a0457aec56364e4005a636dc6c401f9cd (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://php.net/ChangeLog-5.php (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://php.net/ChangeLog-7.php (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:1357 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2016-f4e73663f4 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .