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kernel: um: Fix out-of-bounds read in LDT setup

🗓️ 02 Jul 2025 04:39:40Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

Linux kernel user mode LDT setup has out-of-bounds read from misinterpreting data_count as count.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.2x86_64bpftool4.18.0-193.156.1.el8_2bpftool-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64bpftool-debuginfo4.18.0-193.156.1.el8_2bpftool-debuginfo-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel4.18.0-193.156.1.el8_2kernel-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2noarchkernel-abi-whitelists4.18.0-193.156.1.el8_2kernel-abi-whitelists-4.18.0-193.156.1.el8_2.noarch.rpm
Red Hat Enterprise Linux8.2x86_64kernel-core4.18.0-193.156.1.el8_2kernel-core-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug4.18.0-193.156.1.el8_2kernel-debug-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-core4.18.0-193.156.1.el8_2kernel-debug-core-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-debuginfo4.18.0-193.156.1.el8_2kernel-debug-debuginfo-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-devel4.18.0-193.156.1.el8_2kernel-debug-devel-4.18.0-193.156.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-modules4.18.0-193.156.1.el8_2kernel-debug-modules-4.18.0-193.156.1.el8_2.x86_64.rpm
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30 Jun 2026 01:59Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.1
EPSS0.00267
SSVC
5