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kernel: /sys/kernel/debug/acpi/custom_method can bypass module restrictions

🗓️ 12 Sep 2011 19:40:00Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

Linux kernel before 3.0 allows root to modify arbitrary kernel memory via /sys/kernel/debug/acpi/custom_method.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6x86_64kernel-rt0:2.6.33.9-rt31.75.el6rtkernel-rt-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug0:2.6.33.9-rt31.75.el6rtkernel-rt-debug-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug-debuginfo0:2.6.33.9-rt31.75.el6rtkernel-rt-debug-debuginfo-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug-devel0:2.6.33.9-rt31.75.el6rtkernel-rt-debug-devel-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debuginfo0:2.6.33.9-rt31.75.el6rtkernel-rt-debuginfo-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debuginfo-common-x86_640:2.6.33.9-rt31.75.el6rtkernel-rt-debuginfo-common-x86_64-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-devel0:2.6.33.9-rt31.75.el6rtkernel-rt-devel-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
Red Hat Enterprise Linux6anykernel-rt-doc0:2.6.33.9-rt31.75.el6rt.noarchkernel-rt-doc-0:2.6.33.9-rt31.75.el6rt.noarch.noarch.rpm
Red Hat Enterprise Linux6anykernel-rt-firmware0:2.6.33.9-rt31.75.el6rt.noarchkernel-rt-firmware-0:2.6.33.9-rt31.75.el6rt.noarch.noarch.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-trace0:2.6.33.9-rt31.75.el6rtkernel-rt-trace-0:2.6.33.9-rt31.75.el6rt.x86_64.rpm
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27 Jun 2026 15:39Current
7.3High risk
Vulners AI Score7.3
CVSS 23.6
EPSS0.00928
4