5.5

CVE-2024-40948

mm/page_table_check: fix crash on ZONE_DEVICE

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.17 < 6.1.96
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.36
Linux ≫ Linux Kernel Version >= 6.7 < 6.9.7
Linux ≫ Linux Kernel Version6.10 Updaterc1
Linux ≫ Linux Kernel Version6.10 Updaterc2
Linux ≫ Linux Kernel Version6.10 Updaterc3
Linux ≫ Linux Kernel Version6.10 Updaterc4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.159
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b
Patch
https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0
Patch
https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43
Patch
https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629
Patch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html