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CVE-2007-2525

15
FAUCET Score

CVE-2007-2525 describes a memory leak vulnerability in the PPP over Ethernet (PPPoE) socket implementation within the Linux kernel, affecting versions prior to 2.6.21-git8. A local attacker can exploit this by creating and then prematurely releasing a PPPoE socket, leading to memory consumption and a denial of service. With a CVSS score of 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C), this vulnerability requires local access and low attack complexity to achieve a high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:git7:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
33.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 61st percentile among its peer group of 3,050 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, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-55.0.2.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-8.1.6.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-2525Important

PPPoE socket PPPIOCGCHAN denial of service

May 8, 2007

References

kernel.org / pub/linux/kernel/v2.6/snapshots/patch-2.6.21-git8.log
Patch
rhn.redhat.com / errata/RHSA-2007-0488.html
Vendor Advisory
secunia.com / advisories/25163
PatchVendor Advisory
secunia.com / advisories/25700
Vendor Advisory
secunia.com / advisories/25838
Vendor Advisory
secunia.com / advisories/26133
Vendor Advisory
secunia.com / advisories/26139
Vendor Advisory
secunia.com / advisories/26289
Vendor Advisory
secunia.com / advisories/26450
Vendor Advisory
secunia.com / advisories/26620
Vendor Advisory
secunia.com / advisories/26664
Vendor Advisory
secunia.com / advisories/27227
Vendor Advisory
secunia.com / advisories/29058
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/34150
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10594
rhn.redhat.com / errata/RHSA-2007-0376.html
Vendor Advisory
support.avaya.com / elmodocs2/security/ASA-2007-287.htm
debian.org / security/2007/dsa-1356
debian.org / security/2008/dsa-1503
debian.org / security/2008/dsa-1504
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
novell.com / linux/security/advisories/2007_51_kernel.html
novell.com / linux/security/advisories/2007_53_kernel.html
securityfocus.com / bid/23870
ubuntu.com / usn/usn-486-1
ubuntu.com / usn/usn-489-1
ubuntu.com / usn/usn-510-1
vupen.com / english/advisories/2007/1703
Vendor Advisory