CVE-2001-1244

mediumpriority · track · 38EPSS 0.220 · 98 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

22.0% (98th) EPSS

CVSS 5 · medium

Is it mine?

21 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-23

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.5mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USLLM-inferredCWE-476USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-20997HP-UX 11 / Linux Kernel 2.4 / Windows 2000/NT 4.0 / IRIX 6.5 - Small TCP MSS Denial of Servicefunctional · exploit_db

affected products (21)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
freebsd freebsd= 4.3nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
hp hp-ux= 11.0.4nvdUScpe:2.3:o:hp:hp-ux:*:*:*:*:*:*:*:*
hp hp-ux= 11.00nvdUScpe:2.3:o:hp:hp-ux:*:*:*:*:*:*:*:*
hp hp-ux= 11.11nvdUScpe:2.3:o:hp:hp-ux:*:*:*:*:*:*:*:*
hp vvos= 11.04nvdUScpe:2.3:o:hp:vvos:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.0nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.1nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.2nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.3nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.4nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.4.5nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
microsoft windows 2000all versionsnvdUScpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows nt= 4.0nvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
netbsd netbsd= 1.5nvdUScpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*
netbsd netbsd= 1.5.1nvdUScpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*
openbsd openbsd= 2.8nvdUScpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
openbsd openbsd= 2.9nvdUScpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
sun sunos= 5.5.1nvdUScpe:2.3:o:sun:sunos:*:*:*:*:*:*:*:*
sun sunos= 5.7nvdUScpe:2.3:o:sun:sunos:*:*:*:*:*:*:*:*

showing 20 of 21

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2001-07-07modified 2026-06-16

references (6)

External citations — patches, advisories, analysis.

scry

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