The TCP/IP stack in multiple operating systems allows remote attackers to cause a denial of service (CPU consumption) via a TCP packet with the correct sequence number but the wrong Acknowledgement number, which generates a large number of "keep alive" packets
Published Apr 19, 2005
5.0
MEDIUMCVSS 2.0
EPSS 32.75%
Description
The TCP/IP stack in multiple operating systems allows remote attackers to cause a denial of service (CPU consumption) via a TCP packet with the correct sequence number but the wrong Acknowledgement number, which generates a large number of "keep alive" packets. NOTE: some followups indicate that this issue could not be replicated.
Affected products
No data.
- n/a
- n/a
- n/a
- n/a
- n/a
- datacenter_64-bit
- enterprise
- enterprise
- enterprise_64-bit
- enterprise_64-bit
- r2
- r2
- r2
- standard
- standard
- standard_64-bit
- web
- web
- n/a
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- n/a
- n/a
- n/a
- n/a
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.
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 3, 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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 32.75% (0.32746) | 98.30th | v5 (v2026.06.15) |
| Jul 20, 2026 | 32.75% (0.32746) | 98.16th | v5 (v2026.06.15) |
| Jun 20, 2026 | 37.00% (0.36998) | 98.32th | v5 (v2026.06.15) |
| Jun 15, 2026 | 32.75% (0.32746) | 98.12th | v5 (v2026.06.15) |
| Dec 28, 2025 | 63.72% (0.63724) | 98.34th | v4 (v2025.03.14) |
| Dec 27, 2025 | 44.26% (0.44264) | 97.44th | v4 (v2025.03.14) |
| Oct 28, 2025 | 63.72% (0.63724) | 98.32th | v4 (v2025.03.14) |
| Oct 27, 2025 | 44.26% (0.44264) | 97.41th | v4 (v2025.03.14) |
| Oct 23, 2025 | 63.72% (0.63724) | 98.32th | v4 (v2025.03.14) |
| Oct 1, 2025 | 76.74% (0.76741) | 98.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 44.26% (0.44264) | 97.28th | v4 (v2025.03.14) |
| Mar 29, 2025 | 63.24% (0.63242) | 97.73th | v4 (v2025.03.14) |
| Mar 17, 2025 | 43.33% (0.43331) | 97.19th | v4 (v2025.03.14) |
| Dec 12, 2024 | 63.58% (0.63575) | 97.97th | v3 (v2023.03.01) |
| Oct 25, 2024 | 63.58% (0.63575) | 97.93th | v3 (v2023.03.01) |
| Mar 26, 2024 | 73.47% (0.73469) | 98.03th | v3 (v2023.03.01) |
| Aug 9, 2023 | 74.64% (0.74638) | 97.72th | v3 (v2023.03.01) |
| Mar 10, 2023 | 70.93% (0.70925) | 97.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 69.49% (0.69491) | 97.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 24.73% (0.24729) | 96.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 24.73% (0.24729) | 95.30th | v2 (v2022.01.01) |
No CWE recorded.
References (5)
- http://seclists.org/lists/fulldisclosure/2005/Apr/0358.html mailing-listx_refsource_FULLDISC
- http://seclists.org/lists/fulldisclosure/2005/Apr/0383.html mailing-listx_refsource_FULLDISC
- http://seclists.org/lists/fulldisclosure/2005/Apr/0385.html mailing-listx_refsource_FULLDISC
- http://www.securityfocus.com/bid/13215 vdb-entryx_refsource_BID
- https://exchange.xforce.ibmcloud.com/vulnerabilities/40502 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/lists/fulldisclosure/2005/Apr/0358.html | mailing-listx_refsource_FULLDISC | |
| http://seclists.org/lists/fulldisclosure/2005/Apr/0383.html | mailing-listx_refsource_FULLDISC | |
| http://seclists.org/lists/fulldisclosure/2005/Apr/0385.html | mailing-listx_refsource_FULLDISC | |
| http://www.securityfocus.com/bid/13215 | vdb-entryx_refsource_BID | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/40502 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.