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glibc: FORTIFY_SOURCE format string protection bypass via "nargs" integer overflow

🗓️ 15 Mar 2012 16:30:00Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 6 Views

Integer overflow in vfprintf bypasses fortify source, enabling format attacks and memory writes.

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Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6ppcglibc0:2.12-1.47.el6_2.9glibc-0:2.12-1.47.el6_2.9.ppc.rpm
Red Hat Enterprise Linux6ppc64glibc0:2.12-1.47.el6_2.9glibc-0:2.12-1.47.el6_2.9.ppc64.rpm
Red Hat Enterprise Linux6s390glibc0:2.12-1.47.el6_2.9glibc-0:2.12-1.47.el6_2.9.s390.rpm
Red Hat Enterprise Linux6s390xglibc0:2.12-1.47.el6_2.9glibc-0:2.12-1.47.el6_2.9.s390x.rpm
Red Hat Enterprise Linux6x86_64glibc0:2.12-1.47.el6_2.9glibc-0:2.12-1.47.el6_2.9.x86_64.rpm
Red Hat Enterprise Linux6anyglibc0:2.12-1.47.el6_2.9.i686glibc-0:2.12-1.47.el6_2.9.i686.noarch.rpm
Red Hat Enterprise Linux6ppc64glibc-common0:2.12-1.47.el6_2.9glibc-common-0:2.12-1.47.el6_2.9.ppc64.rpm
Red Hat Enterprise Linux6s390xglibc-common0:2.12-1.47.el6_2.9glibc-common-0:2.12-1.47.el6_2.9.s390x.rpm
Red Hat Enterprise Linux6x86_64glibc-common0:2.12-1.47.el6_2.9glibc-common-0:2.12-1.47.el6_2.9.x86_64.rpm
Red Hat Enterprise Linux6anyglibc-common0:2.12-1.47.el6_2.9.i686glibc-common-0:2.12-1.47.el6_2.9.i686.noarch.rpm
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27 Jun 2026 14:34Current
7.5High risk
Vulners AI Score7.5
CVSS 26.8
EPSS0.02717
6