CVE - CVE-2024-40948

CVE-ID
CVE-2024-40948	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: mm/page_table_check: fix crash on ZONE_DEVICE Not all pages may apply to pgtable check. One example is ZONE_DEVICE pages: they map PFNs directly, and they don't allocate page_ext at all even if there's struct page around. One may reference devm_memremap_pages(). When both ZONE_DEVICE and page-table-check enabled, then try to map some dax memories, one can trigger kernel bug constantly now when the kernel was trying to inject some pfn maps on the dax device: kernel BUG at mm/page_table_check.c:55! While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page fault resolutions, skip all the checks if page_ext doesn't even exist in pgtable checker, which applies to ZONE_DEVICE but maybe more.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b URL:https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b MISC:https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0 URL:https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0 MISC:https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 URL:https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 MISC:https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629 URL:https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629
Assigning CNA
kernel.org
Date Record Created
20240712	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240712)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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