CVE-2026-99168: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: 7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f преди 5c0757b065fbd140d8fbd05dc2c2146b713dfa68; 7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f преди 874194a8de75fc2f4d1fb70c670b289b7e48f93e
• Linux Linux: 6.19; преди 6.19; 7.2.13 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-99168
• https://nvd.nist.gov/vuln/detail/CVE-2026-99168
• https://git.kernel.org/stable/c/5c0757b065fbd140d8fbd05dc2c2146b713dfa68
• https://git.kernel.org/stable/c/874194a8de75fc2f4d1fb70c670b289b7e48f93e