conntrackd crash on unexpected network traffic
Published Aug 24, 2015
5.0
MEDIUMCVSS 2.0
EPSS 3.20%
Description
conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.
Affected products
No data.
Configuration 1
- ≤ 1.4.2
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
conntrack-tools
Affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
conntrack-tools
Will not fix
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
conntrack-tools
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | conntrack-tools | Affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | conntrack-tools | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | conntrack-tools | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.20% (0.03202) | 87.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.20% (0.03202) | 86.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.34% (0.02341) | 83.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.02% (0.02024) | 89.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.02% (0.02024) | 87.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (12)
- http://bugzilla.netfilter.org/show_bug.cgi?id=910 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174875.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174883.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2015-10/msg00015.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.debian.org/security/2015/dsa-3341 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/08/14/4 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/08/18/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-6496 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1253755 Issue Tracking
- https://git.netfilter.org/conntrack-tools/commit/?id=c392c159605956c7bd4a264ab4490e2b2704c0cd x_refsource_CONFIRMPatchVendor AdvisoryURL Repurposed
- https://nvd.nist.gov/vuln/detail/CVE-2015-6496
- https://www.cve.org/CVERecord?id=CVE-2015-6496
Change history (0)
No recorded changes yet.