CVE-2022-49004
- Source
- https://cve.org/CVERecord?id=CVE-2022-49004
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49004.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49004
- Downstream
- Published
- 2024-10-21T20:06:17.410Z
- Modified
- 2026-03-20T12:22:05.514178Z
- Summary
- riscv: Sync efi page table's kernel mappings before switching
- 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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49004.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8
- https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1
- https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49004.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49004
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git