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CVE-2007-4573

35
FAUCET Score

CVE-2007-4573 is a privilege escalation vulnerability affecting the IA32 system call emulation in Linux kernel versions 2.4.x and 2.6.x before 2.6.22.7 on x86_64 architectures. The flaw stems from the eax register not being zero-extended after a 32-bit entry path to ptrace, potentially leading to an out-of-bounds access to the system call table. With a CVSS score of 7.2, this vulnerability is considered high severity, allowing local attackers to gain full control over the system with low attack complexity. While not listed on the KEV catalog, public exploit code exists on ExploitDB, indicating its exploitability, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.35CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:x86_64:*:*:*:*:*
<= 2.6.22.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:x86_64:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.82%
Probability of exploitation in next 30 days
EPSS Percentile
53.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-4460 · Sep 27, 2007
This CVE's current EPSS score of 0.0082 is in the 73rd percentile among its peer group of 3,241 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 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 (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: kernel-0:2.4.21-52.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-55.0.9.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-8.1.14.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-4573Important

x86_64 syscall vulnerability

Sep 21, 2007

References

fedoranews.org / updates/FEDORA-2007-229.shtml
kernel.org / pub/linux/kernel/v2.4/ChangeLog-2.4.35.3
lists.opensuse.org / opensuse-security-announce/2007-12/msg00001.html
lkml.org / lkml/2007/9/21/512
Patch
lkml.org / lkml/2007/9/21/513
marc.info
secunia.com / advisories/26917
secunia.com / advisories/26919
secunia.com / advisories/26934
secunia.com / advisories/26953
secunia.com / advisories/26955
secunia.com / advisories/26978
secunia.com / advisories/26994
secunia.com / advisories/26995
secunia.com / advisories/27212
secunia.com / advisories/27227
secunia.com / advisories/27912
secunia.com / advisories/29058
securitytracker.com / id
issues.rpath.com / browse/RPL-1754
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9735
redhat.com / archives/fedora-package-announce/2007-September/msg00355.html
debian.org / security/2007/dsa-1378
debian.org / security/2007/dsa-1381
debian.org / security/2008/dsa-1504
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.22.7
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
novell.com / linux/security/advisories/2007_53_kernel.html
redhat.com / support/errata/RHSA-2007-0936.html
redhat.com / support/errata/RHSA-2007-0937.html
redhat.com / support/errata/RHSA-2007-0938.html
securityfocus.com / archive/1/480451/100/0/threaded
securityfocus.com / archive/1/480705/100/0/threaded
securityfocus.com / bid/25774
ubuntu.com / usn/usn-518-1
vupen.com / english/advisories/2007/3246