CVE-2022-49004
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49004
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49004.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49004
- Downstream
- Published
- 2024-10-21T20:15:11Z
- Modified
- 2025-08-09T19:01:27Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References