CVE-2021-47227 x86/fpu: Prevent state corruption in __fpu__restore_sig()

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Prevent state corruption in fpurestoresig The non-compacted slowpath uses copyfromuser and copies the entire user buffer into the kernel buffer, verbatim. This means that the kernel buffer may now contain entirely invali...

CVE-2021-47227

The CVE-2021-47227 issue concerns the Linux kernel x86 fpu path: the non‑compacted slowpath could copy a user XSAVE buffer into kernel space via __copy_from_user(), potentially leaving the kernel XSAVE buffer in an invalid state that XRSTOR could fault on. The identified root cause is improper ha...

CVE-2021-47226

CVE-2021-47226 describes a Linux kernel issue where an XRSTOR on a user-buffered FPU state could fail with a page fault yet modify the destination task’s FPU state. The root cause is that during __fpu__restore_sig(), XRSTOR could run with preserved registers for a different task (fpu_fpregs_owner...

CVE-2021-47226 x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer Both Intel and AMD consider it to be architecturally valid for XRSTOR to fail with PF but nonetheless change the register state. The actual conditions under...

CVE-2021-47226 x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer Both Intel and AMD consider it to be architecturally valid for XRSTOR to fail with PF but nonetheless change the register state. The actual conditions under...

CVE-2021-47226

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer Both Intel and AMD consider it to be architecturally valid for XRSTOR to fail with PF but nonetheless change the register state. The actual conditions under...

CVE-2021-47227: Improper Check for Unusual or Exceptional Conditions

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Prevent state corruption in fpurestoresig The non-compacted slowpath uses copyfromuser and copies the entire user buffer into the kernel buffer, verbatim. This means that the kernel buffer may now contain entirely invali...

CVE-2021-47226: Observable Discrepancy

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer Both Intel and AMD consider it to be architecturally valid for XRSTOR to fail with PF but nonetheless change the register state. The actual conditions under...

Medium: kernel

Issue Overview: fpregsstatevalid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of service memory corruption or possibly have unspecified other impact because of incorrect fpufpregsownerctx caching,...

CVE-2024-35801

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

CVE-2024-35801

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

UBUNTU-CVE-2024-35801

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

CVE-2024-35801

A vulnerability exists in the Linux kernel (x86/fpu) where the per-CPU variable xfd_state is not reset during CPU hotplugging . While the MSR_IA32_XFD value is reset to the initial state, the cached xfd_state remains stale, causing them to fall out of sync. This discrepancy can cause a subsequent...

CVE-2024-35801 x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

CVE-2024-35801

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

CVE-2024-35801: Use After Free

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfdstate in sync with MSRIA32XFD Commit 672365477ae8 "x86/fpu: Update XFD state where required" and commit 8bf26758ca96 "x86/fpu: Add XFD state to fpstate" introduced a per CPU variable xfdstate to keep the MSRIA32X...

PT-2024-7187

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The issue is related to the function dcn302 fpu update bw bounding box in the drm/amd/display module, where an incorrect index calculation can occur. This may allow an attacker to impact...

kernel: KVM: s390: fix setting of fpc register

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: fix setting of fpc register kvmarchvcpuioctlsetfpu allows to set the floating point control fpc register of a guest cpu. The new value is tested for validity by temporarily loading it into the fpc register. This may le...

SUSE CVE-2021-47174

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftsetpipapoavx2: Add irqfpuusable check, fallback to non-AVX2 version Arturo reported this backtrace: 709732.358791 WARNING: CPU: 3 PID: 456 at arch/x86/kernel/fpu/core.c:128 kernelfpubeginmask+0xae/0xe0 709732.358793...

DEBIAN-CVE-2021-47174

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftsetpipapoavx2: Add irqfpuusable check, fallback to non-AVX2 version Arturo reported this backtrace: 709732.358791 WARNING: CPU: 3 PID: 456 at arch/x86/kernel/fpu/core.c:128 kernelfpubeginmask+0xae/0xe0 709732.358793...