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glibc: printf() unbound alloca() usage in case of positional parameters + many format specs

🗓️ 18 Jul 2012 15:18:00Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 1 Views

GNU C Library vfprintf misuses unbounded alloca with specs, bypassing fortify and risking crash.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux5i386glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.i386.rpm
Red Hat Enterprise Linux5i686glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.i686.rpm
Red Hat Enterprise Linux5ia64glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.ia64.rpm
Red Hat Enterprise Linux5ppcglibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.ppc.rpm
Red Hat Enterprise Linux5ppc64glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.ppc64.rpm
Red Hat Enterprise Linux5s390glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.s390.rpm
Red Hat Enterprise Linux5s390xglibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.s390x.rpm
Red Hat Enterprise Linux5x86_64glibc0:2.5-81.el5_8.4glibc-0:2.5-81.el5_8.4.x86_64.rpm
Red Hat Enterprise Linux5i386glibc-common0:2.5-81.el5_8.4glibc-common-0:2.5-81.el5_8.4.i386.rpm
Red Hat Enterprise Linux5ia64glibc-common0:2.5-81.el5_8.4glibc-common-0:2.5-81.el5_8.4.ia64.rpm
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21 Nov 2025 17:40Current
6.2Medium risk
Vulners AI Score6.2
CVSS 26.8
EPSS0.00869
1