Back
CVE-2005-2491
Integer overflow in pcre_compile.c in Perl Compatible Regular Expressions (PCRE) before 6.2, as used in multiple products such as Python,…
- 7.5HighCVSS base score
- 4.3%Exploitation in 30 daysEPSS · top 8.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Integer overflow in pcre_compile.c in Perl Compatible Regular Expressions (PCRE) before 6.2, as used in multiple products such as Python, Ethereal, and PHP, allows attackers to execute arbitrary code via quantifier values in regular expressions, which leads to a heap-based buffer overflow.
Timeline
ID reserved
By redhat
- 14 days later
· 14 days later
Published
- 19 years later
· 19 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 4.3% · top 8.7% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
65
- OpenPKG-SA-2005.018 (opens in a new tab)vendor-advisoryx_refsource_OPENPKGx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2005-216.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
- 22691 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 17813 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2006-4502 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- GLSA-200509-08 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
- 14620 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- ADV-2005-2659 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- FLSA:168516 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- GLSA-200509-02 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- TSLSA-2005-0059 (opens in a new tab)vendor-advisoryx_refsource_TRUSTIXx_transferred
- 22875 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SSRT061238 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- SSRT090208 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- oval:org.mitre.oval:def:1659 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- http://www.ethereal.com/appnotes/enpa-sa-00021.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SA:2005:051 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 16502 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SSRT051251 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- 21522 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 16679 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- DSA-817 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- GLSA-200508-17 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- ADV-2005-1511 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 604 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 1014744 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2005-223.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
- APPLE-SA-2005-11-29 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- RHSA-2005:761 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SUSE-SA:2005:049 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- DSA-819 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- ADV-2006-4320 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- RHSA-2005:358 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- oval:org.mitre.oval:def:1496 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- DSA-821 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 19072 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 19532 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.php.net/release_4_4_1.php (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-200509-19 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- oval:org.mitre.oval:def:11516 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 17252 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- GLSA-200509-12 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- SUSE-SA:2005:052 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- oval:org.mitre.oval:def:735 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 15647 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://support.avaya.com/elmodocs2/security/ASA-2006-159.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-800 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 19193 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 102198 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- SUSE-SA:2005:048 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2006:0197 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- ADV-2006-0789 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- [httpd-cvs] 20190815 svn commit: r1048742 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20190815 svn commit: r1048743 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20200401 svn commit: r1058586 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20200401 svn commit: r1058587 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073139 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1888194 [3/13] - /httpd/site/trunk/content/security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073140 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073149 [5/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [httpd-cvs] 20210606 svn commit: r1075470 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_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)
- EUVD EUVD-2005-2492 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2005-2491)Record last updated .