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CVE-2007-5501

21
FAUCET Score

CVE-2007-5501 describes a denial-of-service vulnerability in the Linux kernel (versions 2.6.21 through 2.6.23.7, and 2.6.24-rc through 2.6.24-rc2). Remote attackers can trigger a NULL pointer dereference and crash affected systems by sending crafted ACK responses. This 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 evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.21:*:*:*:*:*:*:*
2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.21:rc1:*:*:*:*:*:*
2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.21:rc2:*:*:*:*:*:*
2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.21:rc3:*:*:*:*:*:*
2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.21:rc4:*:*:*:*:*:*

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
3.82%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0382 is in the 80th percentile among its peer group of 51,506 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

Vendor Advisories (1)

redhatCVE-2007-5501

CVE-2007-5501

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2008-03/msg00002.html
lwn.net / Articles/258947
secunia.com / advisories/27664
Vendor Advisory
secunia.com / advisories/27703
Vendor Advisory
secunia.com / advisories/27888
Vendor Advisory
secunia.com / advisories/27919
Vendor Advisory
secunia.com / advisories/27922
Vendor Advisory
secunia.com / advisories/28170
Vendor Advisory
secunia.com / advisories/28706
Vendor Advisory
secunia.com / advisories/29245
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/38548
issues.rpath.com / browse/RPL-1965
redhat.com / archives/fedora-package-announce/2007-December/msg00032.html
redhat.com / archives/fedora-package-announce/2007-December/msg00170.html
redhat.com / archives/fedora-package-announce/2007-December/msg00302.html
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.23.8
Vendor Advisory
kernel.org / pub/linux/kernel/v2.6/testing/ChangeLog-2.6.24-rc3
mandriva.com / security/advisories
Vendor Advisory
novell.com / linux/security/advisories/2007_63_kernel.html
securityfocus.com / bid/26474
Patch
ubuntu.com / usn/usn-558-1
ubuntu.com / usn/usn-574-1
vupen.com / english/advisories/2007/3902
Vendor Advisory