CVE-2007-3731

Linux Kernel 2.6.20-2.6.21 - Denial of Service via Invalid LDT Segment Selector in PTRACE_SINGLESTEP

Title source: llm

Description

The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.

References (18)

Core 18

Core References

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/25801

Exploit x_refsource_misc

http://bugzilla.kernel.org/show_bug.cgi?id=8765

Patch x_refsource_confirm

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f

Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb

http://osvdb.org/37286

Vendor Advisory vendor-advisory x_refsource_redhat

http://www.redhat.com/support/errata/RHSA-2007-0940.html

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/29159

Patch x_refsource_confirm

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/27322

Third Party Advisory x_refsource_confirm

http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/26978

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/488972/100/0/threaded

Issue Tracking x_refsource_confirm

https://issues.rpath.com/browse/RPL-2304

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/usn-518-1

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/26955

Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394

Patch x_refsource_confirm

https://bugzilla.redhat.com/show_bug.cgi?id=248324

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/26935

Third Party Advisory vendor-advisory x_refsource_debian

http://www.debian.org/security/2007/dsa-1378

Scores

EPSS 0.0051

EPSS Percentile 40.1%

Details

CWE

CWE-20

Status published

Products (2)

linux/linux_kernel 2.6.20

linux/linux_kernel 2.6.21

Published Sep 17, 2007

Tracked Since Feb 18, 2026