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

🗓️ 15 Jul 2025 00:39:13Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

User mode Local Descriptor Table setup misreads data_count as bytes, causing read out of bounds.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.2aarch64bpftool7.0.0-284.125.1.el9_2bpftool-7.0.0-284.125.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lebpftool7.0.0-284.125.1.el9_2bpftool-7.0.0-284.125.1.el9_2.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xbpftool7.0.0-284.125.1.el9_2bpftool-7.0.0-284.125.1.el9_2.s390x.rpm
Red Hat Enterprise Linux9.2x86_64bpftool7.0.0-284.125.1.el9_2bpftool-7.0.0-284.125.1.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64bpftool-debuginfo7.0.0-284.125.1.el9_2bpftool-debuginfo-7.0.0-284.125.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lebpftool-debuginfo7.0.0-284.125.1.el9_2bpftool-debuginfo-7.0.0-284.125.1.el9_2.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xbpftool-debuginfo7.0.0-284.125.1.el9_2bpftool-debuginfo-7.0.0-284.125.1.el9_2.s390x.rpm
Red Hat Enterprise Linux9.2x86_64bpftool-debuginfo7.0.0-284.125.1.el9_2bpftool-debuginfo-7.0.0-284.125.1.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64kernel5.14.0-284.125.1.el9_2kernel-5.14.0-284.125.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lekernel5.14.0-284.125.1.el9_2kernel-5.14.0-284.125.1.el9_2.ppc64le.rpm
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30 Jun 2026 03:30Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.1
EPSS0.00267
SSVC
5