CVE-2025-22045High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs On the following path, flush_tlb_range() can be used for zapping normal PMD entries (PMD entries that p…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs
On the following path, flush_tlb_range() can be used for zapping normal PMD entries (PMD entries that point to page tables) together with the PTE entries in the pointed-to page table:
collapse_pte_mapped_thp
pmdp_collapse_flush
flush_tlb_range
The arm64 version of flush_tlb_range() has a comment describing that it can be used for page table removal, and does not use any last-level invalidation optimizations. Fix the X86 version by making it behave the same way.
Currently, X86 only uses this information for the following two purposes, which I think means the issue doesn't have much impact:
The patch "x86/mm: only invalidate final translations with INVLPGB" which is currently under review (see https://lore.kernel.org/all/[email protected]/) would probably be making the impact of this a lot worse.
linux_kernel >= 4.20, < 5.4.292linux_kernel >= 5.5, < 5.10.236linux_kernel >= 5.11, < 5.15.180linux_kernel >= 5.16, < 6.1.134linux_kernel >= 6.2, < 6.6.87linux_kernel >= 6.7, < 6.12.23linux_kernel >= 6.13, < 6.13.11linux_kernel >= 6.14, < 6.14.2Upgrade past the affected range:
linux_kernel 6.14.2Connected by shared product, vendor, weakness, or advisory.
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