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Vulnerability record · CVE-2001-1244 · published 7 July 2001

CVE-2001-1244: Freebsd vulnerability

Freebsd · Freebsd

Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.

5.0 CVSS 2.0 Medium EPSS 22% · top 2.4%
5.0CVSS 2.0 base score
22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
6References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/archive/1/195457
http://www.securityfocus.com/bid/2997 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6824
http://www.securityfocus.com/archive/1/195457
http://www.securityfocus.com/bid/2997 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6824

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2001-1244), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.