In the Linux kernel, the following vulnerability has been resolved:
x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD
Commit 672365477ae8 ("x86/fpu: Update XFD state where required") and
commit 8bf26758ca96 ("x86/fpu: Add XFD state to fpstate") introduced a
per CPU variable xfd_state to keep the MSR_IA32_XFD value cached, in
order to avoid unnecessary writes to the MSR.
On CPU hotplug MSR_IA32_XFD is reset to the init_fpstate.xfd, which
wipes out any stale state. But the per CPU cached xfd value is not
reset, which brings them out of sync.
As a consequence a subsequent xfd_update_state() might fail to update
the MSR which in turn can result in XRSTOR raising a #NM in kernel
space, which crashes the kernel.
To fix this, introduce xfd_set_state() to write xfd_state together
with MSR_IA32_XFD, and use it in all places that set MSR_IA32_XFD.
References
Configurations
Configuration 1 (hide)
|
History
19 Sep 2025, 15:44
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | NVD-CWE-noinfo | |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422 - Patch | |
| References | () https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd - Patch | |
| References | () https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d - Patch | |
| References | () https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8 - Patch | |
| References | () https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624 - Patch |
Information
Published : 2024-05-17 14:15
Updated : 2025-09-19 15:44
NVD link : CVE-2024-35801
Mitre link : CVE-2024-35801
CVE.ORG link : CVE-2024-35801
JSON object : View
Products Affected
linux
- linux_kernel
CWE