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Fencer Intel
medium 5.0

CVE-2015-6251 json

Double free vulnerability in GnuTLS before 3.3.17 and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service via a long Di…

published 11y ago modified 4mo ago also EUVD-2015-6193

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
19.2%
EPSS 19.2% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

Double free vulnerability in GnuTLS before 3.3.17 and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service via a long DistinguishedName (DN) entry in a certificate.

Patch / fix

  • gnutls28 Debian 14, Debian 13, Debian 12 3.3.17-1

debian advisories DEBIAN-CVE-2015-6251

  • gnutls28 Ubuntu 16.04 LTS 3.3.15-5ubuntu2

ubuntu advisories UBUNTU-CVE-2015-6251

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gnutls SLES for SAP 12, SLES 12, SLED 12 +1 more 3.2.15-11.1

suse advisories SUSE-SU-2015:1518-1

  • gnutls openSUSE Tumbleweed 3.4.15-1.1

opensuse advisories openSUSE-SU-2024:10105-1

Is CVE-2015-6251 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-6251 updated cvss 4.3

gnutls: double free flaw in certificate DN decoding (GNUTLS-SA-2015-3)

  • Red Hat Enterprise Linux 7 gnutls, gnutls-c++, gnutls-dane, gnutls-utils
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 gnutls Red Hat Enterprise Linux 6 gnutls, gnutls-guile, gnutls-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

19.18% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.