Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page table. With VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area: if the stack is allocated in a new PGD (one that was not present at the moment of the efi page table creation or not synced in a previous vmalloc fault), the kernel will take a trap when switching to the efi page table when the vmalloc kernel stack is accessed, resulting in a kernel panic. Fix that by updating the efi kernel mappings before switching to the efi page table.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10, < 5.15.82 |
References
- https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8Patch
- https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1Patch
- https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7Patch
FAQ
What is CVE-2022-49004?
CVE-2022-49004 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page...
How severe is CVE-2022-49004?
CVE-2022-49004 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49004?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.