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kernel: x86/fpu: Stop relying on userspace for info to fault in xsave buffer that cause loop forever

🗓️ 05 Jun 2024 10:05:30Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Flaw in Linux kernel x86 fpu module lets user control xstate_size to cause xrstor faults and infinite loop.

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IBM Security Bulletins		Security Bulletin: Vulnerability in linux (Kernel) affects IBM Integrated Analytics System.
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nessus
Tenable Nessus		Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2024-549)
6 Mar 202400:00
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Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2024-058 (ALASKERNEL-5.15-2024-058)
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Tenable Nessus		AlmaLinux 8 : kernel update (Medium) (ALSA-2024:3618)
5 Jun 202400:00
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Tenable Nessus		AlmaLinux 8 : kernel-rt (ALSA-2024:3627)
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Tenable Nessus		Debian dsa-5658 : affs-modules-6.1.0-11-4kc-malta-di - security update
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Tenable Nessus		EulerOS Virtualization 2.11.1 : kernel (EulerOS-SA-2024-1734)
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Tenable Nessus		EulerOS Virtualization 2.11.0 : kernel (EulerOS-SA-2024-1735)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.10x86_64kernel-rt4.18.0-553.5.1.rt7.346.el8_10kernel-rt-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-core4.18.0-553.5.1.rt7.346.el8_10kernel-rt-core-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-core4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-core-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-debuginfo4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-debuginfo-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-devel4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-devel-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-kvm4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-kvm-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-modules4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-modules-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-modules-extra4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debug-modules-extra-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debuginfo4.18.0-553.5.1.rt7.346.el8_10kernel-rt-debuginfo-4.18.0-553.5.1.rt7.346.el8_10.x86_64.rpm
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25 Aug 2026 14:46Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.15.5
EPSS0.00278
SSVC
CWE-835
linux kernelfpu modulestate sizesigreturn framexrstor faultunmapped memory
4