CVE-2026-99168None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: mshv_vtl: Check per-CPU register page before mmap Register-page setup is optional for each CPU. If allocation or registration fails, mshv_vtl_configure_reg_page() warn…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
In the Linux kernel, the following vulnerability has been resolved:
mshv_vtl: Check per-CPU register page before mmap
Register-page setup is optional for each CPU. If allocation or registration fails, mshv_vtl_configure_reg_page() warns and leaves that CPU's reg_page NULL, but initial context setup continues successfully. Meanwhile, successful setup on another CPU sets the global mshv_has_reg_page flag.
mshv_vtl_fault() checks this global flag before selecting the requested CPU's register page. With mixed setup results across online CPUs, the check passes even for a CPU with no register page, reaching get_page(NULL) when userspace faults in that mapping.
Check the selected per-CPU register page before taking its reference and return VM_FAULT_SIGBUS if it is absent.
Linux >= 7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f < 5c0757b065fbd140d8fbd05dc2c2146b713dfa68Linux >= 7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f < 874194a8de75fc2f4d1fb70c670b289b7e48f93eLinux 6.19Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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