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kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination

🗓️ 19 Mar 2024 00:27:39Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 1 Views

Kernel tls flaw allows out-of-bounds write when splicing to a ktls socket, risking crash.

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Tenable Nessus		Alibaba Cloud Linux 3 : 0149: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2024:0149)
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Tenable Nessus		AlmaLinux 8 : kpatch-patch (ALSA-2024:0876)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.4ppc64lebpftool0:4.18.0-305.125.1.el8_4bpftool-0:4.18.0-305.125.1.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64bpftool0:4.18.0-305.125.1.el8_4bpftool-0:4.18.0-305.125.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4ppc64lebpftool-debuginfo0:4.18.0-305.125.1.el8_4bpftool-debuginfo-0:4.18.0-305.125.1.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64bpftool-debuginfo0:4.18.0-305.125.1.el8_4bpftool-debuginfo-0:4.18.0-305.125.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4ppc64lekernel0:4.18.0-305.125.1.el8_4kernel-0:4.18.0-305.125.1.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64kernel0:4.18.0-305.125.1.el8_4kernel-0:4.18.0-305.125.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4anykernel-abi-stablelists0:4.18.0-305.125.1.el8_4.noarchkernel-abi-stablelists-0:4.18.0-305.125.1.el8_4.noarch.noarch.rpm
Red Hat Enterprise Linux8.4ppc64lekernel-core0:4.18.0-305.125.1.el8_4kernel-core-0:4.18.0-305.125.1.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64kernel-core0:4.18.0-305.125.1.el8_4kernel-core-0:4.18.0-305.125.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4ppc64lekernel-debug0:4.18.0-305.125.1.el8_4kernel-debug-0:4.18.0-305.125.1.el8_4.ppc64le.rpm
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12 May 2026 11:26Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17 - 7.8
EPSS0.0002
SSVC
CWE-787
kernel tlssplice misusememory corruptionprivilege escalationread only memory
1