CVE-2007-3731

NameCVE-2007-3731
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-1378-1, DSA-1378-2

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
fai-kernelssourceetch1.17+etch.13etch3DSA-1378-2
linux-2.6sourceetch2.6.18.dfsg.1-13etch3DSA-1378-2
linux-2.6source(unstable)2.6.23-1
user-mode-linuxsourceetch2.6.18-1um-2etch.13etch3DSA-1378-2

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