CVE-2024-40948
"Linux Kernel ZONE_DEVICE Page Table Check Crash Vulnerability"
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.
INFO
Published Date :
July 12, 2024, 1:15 p.m.
Last Modified :
Nov. 21, 2024, 9:31 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2024-40948.
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The following table lists the changes that have been made to the
CVE-2024-40948 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b Added Reference https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0 Added Reference https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 Added Reference https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 12, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-40948 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-40948
weaknesses.