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kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe

🗓️ 30 Jan 2024 12:29:53Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

BPF verifier pruning flaw in the Linux kernel may misclassify unsafe paths as safe, enabling kernel reads and privilege escalation.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.4x86_64kernel-rt4.18.0-305.120.1.rt7.196.el8_4kernel-rt-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-core4.18.0-305.120.1.rt7.196.el8_4kernel-rt-core-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-core4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-core-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-debuginfo4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-debuginfo-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-devel4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-devel-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-kvm4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-kvm-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-modules4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-modules-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-modules-extra4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debug-modules-extra-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debuginfo4.18.0-305.120.1.rt7.196.el8_4kernel-rt-debuginfo-4.18.0-305.120.1.rt7.196.el8_4.x86_64.rpm
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12 Jul 2026 14:20Current
6.9Medium risk
Vulners AI Score6.9
CVSS 3.18.8 - 10
EPSS0.03546
SSVC
4