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CVE-2016-6261
The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service…
High7.5EPSS 4.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via 64 bytes of input.
Timeline
ID reserved
By mitre
- 48 days later
· 48 days later
Published
- 8 years later
· 8 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 | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.4% · top 8.7% of all CVEs (8 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.
Weakness
Affected products
n/a
- affected n/a
References (11)
- [oss-security] 20160721 Re: CVE request: multiple issues fixed in GNU libidn 1.33 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- openSUSE-SU-2016:2135 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- [oss-security] 20160720 CVE request: multiple issues fixed in GNU libidn 1.33 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 92070 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-3658 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=f20ce1128fb7f4d33297eee307dddaf0f92ac72d (opens in a new tab)x_refsource_CONFIRMx_transferred
- [help-libidn] 20160720 Libidn 1.33 released (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-3068-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- [help-libidn] 20150709 out of bounds stack read in function idna_to_ascii_4i (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 (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)
- 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-2016-6261)Record last updated .