What is CVE-2006-4997?

CVE-2006-4997 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.5/10. Published 2006-10-10.

How severe is CVE-2006-4997?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Linux Kernel

CVE-2006-4997

The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic) via unknown vectors that cause the ATM subsystem to access the memory of socket buffers after they are freed (freed pointer dereference).

Vulnerability class: Use-After-Free

Published 2006-10-10 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.049 (91.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.047 · newest: 0.049 · change: +0.001

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 5.10, 6.06, 6.10
Red Hat Enterprise Linux — versions 2.1, 3, 4

Weakness classification (CWE)

CWE-416 — Use After Free

References

bugzilla.redhat.com/bugzilla/show_bug.cgi (Exploit, Issue Tracking)
www.securityfocus.com/bid/20363 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.mandriva.com/security/advisories (vendor-advisory, Broken Link)
www.novell.com/linux/security/advisories/2006_79_kernel.html (vendor-advisory, Broken Link)
secunia.com/advisories/22253 (Broken Link, Vendor Advisory, third-party-advisory)
www.redhat.com/support/errata/RHSA-2007-0012.html (vendor-advisory, Broken Link)
secunia.com/advisories/22279 (Patch, Broken Link, Vendor Advisory, third-party-advisory)
secunia.com/advisories/23788 (Broken Link, third-party-advisory)
secunia.com/advisories/22292 (Patch, Broken Link, Vendor Advisory, third-party-advisory)
www.redhat.com/support/errata/RHSA-2007-0013.html (vendor-advisory, Broken Link)

Frequently asked questions

What is CVE-2006-4997?: CVE-2006-4997 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.5/10. Published 2006-10-10.
How severe is CVE-2006-4997?: High severity. CVSS v3 base score is 7.5 out of 10.