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CVE-2006-4623

21
FAUCET Score

CVE-2006-4623 describes a denial-of-service vulnerability in the Unidirectional Lightweight Encapsulation (ULE) decapsulation component of the Linux kernel's dvb driver, specifically affecting versions up to 2.6.17.8. A remote attacker can exploit this by sending a ULE packet with a zero-length SNDU, causing the system to crash. The vulnerability has a high severity CVSS score of 7.8, indicating it is easily exploitable over the network with no authentication required, leading to a complete loss of availability. There is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this older vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.17.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.17.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.01%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0401 is in the 81st percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-42.0.3.EL
View patch

Vendor Advisories (1)

redhatCVE-2006-4623Low

security flaw

Aug 21, 2006

References

lkml.org / lkml/2006/8/20/278
Patch
secunia.com / advisories/21820
PatchVendor Advisory
secunia.com / advisories/22292
secunia.com / advisories/22382
secunia.com / advisories/22441
secunia.com / advisories/22945
secunia.com / advisories/23474
secunia.com / advisories/25691
secunia.com / advisories/25714
secunia.com / advisories/26139
issues.rpath.com / browse/RPL-721
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9775
support.avaya.com / elmodocs2/security/ASA-2006-249.htm
debian.org / security/2007/dsa-1304
mandriva.com / security/advisories
novell.com / linux/security/advisories/2006_79_kernel.html
redhat.com / support/errata/RHSA-2006-0689.html
securityfocus.com / archive/1/448998/100/0/threaded
securityfocus.com / archive/1/471457
securityfocus.com / bid/19939
Patch
ubuntu.com / usn/usn-489-1
vupen.com / english/advisories/2006/3551