CVE-2025-22045 (GCVE-0-2025-22045)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2025-05-26 05:17
Severity ?
Summary
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: - In native_flush_tlb_multi() for checking if lazy TLB CPUs need to be IPI'd to avoid issues with speculative page table walks. - In Hyper-V TLB paravirtualization, again for lazy TLB stuff. The patch "x86/mm: only invalidate final translations with INVLPGB" which is currently under review (see <https://lore.kernel.org/all/20241230175550.4046587-13-riel@surriel.com/>) would probably be making the impact of this a lot worse.
References
Impacted products
Vendor Product Version
Linux Linux Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
Version: 016c4d92cd16f569c6485ae62b076c1a4b779536
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/include/asm/tlbflush.h"
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              "version": "0",
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mm: Fix flush_tlb_range() when used for zapping normal PMDs\n\nOn the following path, flush_tlb_range() can be used for zapping normal\nPMD entries (PMD entries that point to page tables) together with the PTE\nentries in the pointed-to page table:\n\n    collapse_pte_mapped_thp\n      pmdp_collapse_flush\n        flush_tlb_range\n\nThe arm64 version of flush_tlb_range() has a comment describing that it can\nbe used for page table removal, and does not use any last-level\ninvalidation optimizations. Fix the X86 version by making it behave the\nsame way.\n\nCurrently, X86 only uses this information for the following two purposes,\nwhich I think means the issue doesn\u0027t have much impact:\n\n - In native_flush_tlb_multi() for checking if lazy TLB CPUs need to be\n   IPI\u0027d to avoid issues with speculative page table walks.\n - In Hyper-V TLB paravirtualization, again for lazy TLB stuff.\n\nThe patch \"x86/mm: only invalidate final translations with INVLPGB\" which\nis currently under review (see\n\u003chttps://lore.kernel.org/all/20241230175550.4046587-13-riel@surriel.com/\u003e)\nwould probably be making the impact of this a lot worse."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:17:16.433Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/618d5612ecb7bfc1c85342daafeb2b47e29e77a3"
        },
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          "url": "https://git.kernel.org/stable/c/0a8f806ea6b5dd64b3d1f05ff774817d5f7ddbd1"
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        {
          "url": "https://git.kernel.org/stable/c/7085895c59e4057ffae17f58990ccb630087d0d2"
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        {
          "url": "https://git.kernel.org/stable/c/93224deb50a8d20df3884f3672ce9f982129aa50"
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        },
        {
          "url": "https://git.kernel.org/stable/c/78d6f9a9eb2a5da6fcbd76d6191d24b0dcc321be"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ef938c3503563bfc2ac15083557f880d29c2e64"
        }
      ],
      "title": "x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22045",
    "datePublished": "2025-04-16T14:12:05.849Z",
    "dateReserved": "2024-12-29T08:45:45.810Z",
    "dateUpdated": "2025-05-26T05:17:16.433Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-22045\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-16T15:15:57.920\",\"lastModified\":\"2025-04-17T20:22:16.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nx86/mm: Fix flush_tlb_range() when used for zapping normal PMDs\\n\\nOn the following path, flush_tlb_range() can be used for zapping normal\\nPMD entries (PMD entries that point to page tables) together with the PTE\\nentries in the pointed-to page table:\\n\\n    collapse_pte_mapped_thp\\n      pmdp_collapse_flush\\n        flush_tlb_range\\n\\nThe arm64 version of flush_tlb_range() has a comment describing that it can\\nbe used for page table removal, and does not use any last-level\\ninvalidation optimizations. Fix the X86 version by making it behave the\\nsame way.\\n\\nCurrently, X86 only uses this information for the following two purposes,\\nwhich I think means the issue doesn\u0027t have much impact:\\n\\n - In native_flush_tlb_multi() for checking if lazy TLB CPUs need to be\\n   IPI\u0027d to avoid issues with speculative page table walks.\\n - In Hyper-V TLB paravirtualization, again for lazy TLB stuff.\\n\\nThe patch \\\"x86/mm: only invalidate final translations with INVLPGB\\\" which\\nis currently under review (see\\n\u003chttps://lore.kernel.org/all/20241230175550.4046587-13-riel@surriel.com/\u003e)\\nwould probably be making the impact of this a lot worse.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0708fd6bd8161871bfbadced2ca4319b84ab44fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0a8f806ea6b5dd64b3d1f05ff774817d5f7ddbd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/320ac1af4c0bdb92c864dc9250d1329234820edf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3ef938c3503563bfc2ac15083557f880d29c2e64\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/556d446068f90981e5d71ca686bdaccdd545d491\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/618d5612ecb7bfc1c85342daafeb2b47e29e77a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7085895c59e4057ffae17f58990ccb630087d0d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/78d6f9a9eb2a5da6fcbd76d6191d24b0dcc321be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/93224deb50a8d20df3884f3672ce9f982129aa50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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