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CVE-2006-1991
The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access…
Medium6.4EPSS 2.2%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.2% · top 17% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.
Weakness
Affected products
n/a
- affected n/a
References (12)
- 1015979 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- php-substrcompare-length-dos(26003) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- SUSE-SA:2006:031 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- MDKSA-2006:091 (opens in a new tab)vendor-advisoryx_refsource_MANDRAKEx_transferred
- GLSA-200605-08 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 20269 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20676 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-320-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 21125 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02 (opens in a new tab)x_refsource_MISCx_transferred
- ADV-2006-1500 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20052 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_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)
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[](https://trackcve.app/cve/CVE-2006-1991)Record last updated .