What is CVE-2001-0851?

CVE-2001-0851 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.0 out of 10. CVE-2001-0851 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2001-0851?

CVE-2001-0851 has a CVSS score of 5.0 out of 10, rated Medium severity. The vector string is AV:N/AC:L/Au:N/C:P/I:N/A:N.

Is there a patch available for CVE-2001-0851?

No patch is currently available for CVE-2001-0851. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2001-0851 actively exploited?

CVE-2001-0851 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2001-0851

Medium

Linux kernel 2.0, 2.2 and 2.4 with syncookies enabled allows remote attackers to bypass firewall rules by brute force guessing the cookie.

Package Linux Kernel

Published 2001-12-06

Last modified 2026-04-16

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

5.0

out of 10

Medium

Attack Vector

Network

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

None

Vector string

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

References

The following references provide additional information about CVE-2001-0851 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Distro
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000432
Linux-Mandrake
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-082.php3
Novell
http://www.novell.com/linux/security/advisories/2001_039_kernel2_txt.html
Red Hat
http://www.redhat.com/support/errata/RHSA-2001-142.html
Exchange
https://exchange.xforce.ibmcloud.com/vulnerabilities/7461
Kernel patch commit
http://www.caldera.com/support/security/advisories/CSSA-2001-038.0.txt
Patch
Kernel patch commit
http://www.linuxsecurity.com/advisories/other_advisory-1683.html
Patch

Details

CVE ID CVE-2001-0851

Severity Medium

CVSS score 5.0 / 10

CVSS version 2.0

Published 2001-12-06

Modified 2026-04-16

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2001-0851?

CVE-2001-0851 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.0 out of 10 . CVE-2001-0851 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2001-0851?

CVE-2001-0851 has a CVSS score of 5.0 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:N/AC:L/Au:N/C:P/I:N/A:N.
Is there a patch available for CVE-2001-0851?

No patch is currently available for CVE-2001-0851. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2001-0851 actively exploited?

No — CVE-2001-0851 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.