{"cve":"CVE-2022-49004","nvd":{"published":"2024-10-21T20:15:11.990","modified":"2026-06-17T05:16:49.630","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: Sync efi page table's kernel mappings before switching\n\nThe EFI page table is initially created as a copy of the kernel page table.\nWith VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area:\nif the stack is allocated in a new PGD (one that was not present at the\nmoment of the efi page table creation or not synced in a previous vmalloc\nfault), the kernel will take a trap when switching to the efi page table\nwhen the vmalloc kernel stack is accessed, resulting in a kernel panic.\n\nFix that by updating the efi kernel mappings before switching to the efi\npage table.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8","https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1","https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:56:33.105311382+00:00"},"epss":{"cve":"CVE-2022-49004","score":0.00245,"percentile":0.15851,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}