CVE-2024-35801 Affecting kernel-tools-libs-devel package, versions <0:4.18.0-553.16.1.el8_10
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLSLIBSDEVEL-6902856
- published 18 May 2024
- disclosed 17 May 2024
Introduced: 17 May 2024
CVE-2024-35801 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-tools-libs-devel to version 0:4.18.0-553.16.1.el8_10 or higher.
This issue was patched in RHSA-2024:5101.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools-libs-devel package and not the kernel-tools-libs-devel package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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
- https://access.redhat.com/security/cve/CVE-2024-35801
- https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422
- https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd
- https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d
- https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8
- https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624