One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data
Published Aug 9, 2018
5.3
MEDIUMCVSS 3.0
EPSS 3.23%
Description
One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.
Affected products
-
- Version All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10StatusaffectedConstraints-
- Version
- 10.4
- 10.4
- 10.4
- 10.4
- 10.4
- 10.4
- 10.4
- 10.4
- 10.4
- 11.1
- 11.1
- 11.1
- 11.1
- 11.1
- 11.1
- 11.1
- 11.1
- 11.1
- 11.2
No data.
No Red Hat product state for this CVE.
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 3.23% (0.03226) | 87.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.23% (0.03226) | 86.58th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.44% (0.00438) | 75.03th | v3 (v2023.03.01) |
| Mar 27, 2024 | 0.44% (0.00438) | 74.26th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00467) | 74.79th | v3 (v2023.03.01) |
| Dec 31, 2023 | 0.55% (0.00550) | 75.04th | v3 (v2023.03.01) |
| Sep 7, 2023 | 0.79% (0.00786) | 79.28th | v3 (v2023.03.01) |
| Aug 3, 2023 | 0.80% (0.00798) | 79.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.74% (0.00743) | 77.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v1 |
| Jan 6, 2022 | 1.25% (0.01247) | 29.93th | v1 |
| Sep 1, 2021 | 1.25% (0.01247) | 68.62th | v1 |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (5)
- http://www.securityfocus.com/bid/105058 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041425 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://security.netapp.com/advisory/ntap-20180815-0002/ x_refsource_CONFIRMThird Party Advisory
- https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html x_refsource_CONFIRMPatch
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105058 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041425 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://security.netapp.com/advisory/ntap-20180815-0002/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc | vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory | |
| https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html | x_refsource_CONFIRMPatch |
Change history (0)
No recorded changes yet.