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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2007-09-17T17:00:00

Updated: 2024-08-07T14:28:52.052Z

Reserved: 2007-07-12T00:00:00

Link: CVE-2007-3731

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2007-09-17T17:17:00.000

Modified: 2023-02-13T02:18:02.567

Link: CVE-2007-3731

cve-icon Redhat

Severity : Moderate

Publid Date: 2007-07-15T00:00:00Z

Links: CVE-2007-3731 - Bugzilla