FKIE_CVE-2026-64131

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/memory: fix spurious warning when unmapping device-private/exclusive pages Device private and exclusive entries are only supported for anonymous folios. This condition is tested in __migrate_device_pages() and make_device_exclusive() using folio_test_anon(). However the unmap path tests this assumption using vma_is_anonymous(). This is wrong because whilst anonymous VMAs can only contain folios where folio_test_anon() is true the opposite relation does not hold. A folio for which folio_test_anon() is true does not imply vma_is_anonymous() is true. Such a condition can occur if for example a folio is part of a private filebacked mapping. In this case vma_is_anonymous() is false as the mapping is filebacked, but folio_test_anon() may be true, thus permitting devices to migrate the folio to device private memory. This can lead to the following spurious warnings during process teardown: [ 772.737706] ------------[ cut here ]------------ [ 772.739201] WARNING: mm/memory.c:1754 at unmap_page_range.cold+0x26/0x18a, CPU#17: hmm-tests/2041 [ 772.742050] Modules linked in: test_hmm nvidia_uvm(O) nvidia(O) [ 772.743959] CPU: 17 UID: 0 PID: 2041 Comm: hmm-tests Tainted: G W O 7.0.0+ #387 PREEMPT(full) [ 772.747104] Tainted: [W]=WARN, [O]=OOT_MODULE [ 772.748509] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 [ 772.752117] RIP: 0010:unmap_page_range.cold+0x26/0x18a [ 772.753780] Code: 7e fe ff ff 48 89 4c 24 78 4c 89 44 24 38 e8 f2 ff b1 00 48 8b 4c 24 78 4c 8b 44 24 38 48 8b 44 24 18 48 83 78 48 00 74 04 90 <0f> 0b 90 48 89 ca b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a 80 3c 02 [ 772.759602] RSP: 0018:ffff888112607550 EFLAGS: 00010286 [ 772.761310] RAX: ffff88811bbf4dc0 RBX: dffffc0000000000 RCX: ffffea03e9bfffd8 [ 772.763583] RDX: 1ffff1102377e9c1 RSI: 0000000000000008 RDI: ffff88811bbf4e08 [ 772.765914] RBP: 0000000000000006 R08: ffff8881059f7448 R09: ffffed10224c0e68 [ 772.768184] R10: ffff888112607347 R11: 0000000000000001 R12: 0000000000000001 [ 772.770461] R13: ffffea03e9bfffc0 R14: ffff888112607908 R15: ffffea03e9bfffc0 [ 772.772782] FS: 00007f327caa2780(0000) GS:ffff888427b7d000(0000) knlGS:0000000000000000 [ 772.775328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 772.777187] CR2: 00007f327ca89000 CR3: 00000001994d5000 CR4: 00000000000006f0 [ 772.779135] Call Trace: [ 772.779792] <TASK> [ 772.780317] ? dmirror_interval_invalidate+0x1a3/0x290 [test_hmm] [ 772.781873] ? vm_normal_page_pud+0x2b0/0x2b0 [ 772.782992] ? __rwlock_init+0x150/0x150 [ 772.784006] ? lock_release+0x216/0x2b0 [ 772.785008] ? __mmu_notifier_invalidate_range_start+0x505/0x6e0 [ 772.786522] ? lock_release+0x216/0x2b0 [ 772.787498] ? unmap_single_vma+0xb6/0x210 [ 772.788573] unmap_vmas+0x27d/0x520 [ 772.789506] ? unmap_single_vma+0x210/0x210 [ 772.790607] ? mas_update_gap.part.0+0x620/0x620 [ 772.791834] unmap_region+0x19e/0x350 [ 772.792769] ? remove_vma+0x130/0x130 [ 772.793684] ? mas_alloc_nodes+0x1f2/0x300 [ 772.794730] vms_complete_munmap_vmas+0x8c1/0xe20 [ 772.795926] ? unmap_region+0x350/0x350 [ 772.796917] do_vmi_align_munmap+0x36a/0x4e0 [ 772.798018] ? lock_release+0x216/0x2b0 [ 772.799024] ? vma_shrink+0x620/0x620 [ 772.799983] do_vmi_munmap+0x150/0x2c0 [ 772.800939] __vm_munmap+0x161/0x2c0 [ 772.801872] ? expand_downwards+0xd60/0xd60 [ 772.802948] ? clockevents_program_event+0x1ef/0x540 [ 772.804217] ? lock_release+0x216/0x2b0 [ 772.805158] __x64_sys_munmap+0x59/0x80 [ 772.805776] do_syscall_64+0xfc/0x670 [ 772.806336] ? irqentry_exit+0xda/0x580 [ 772.806976] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 772.807772] RIP: 0033:0x7f327cbb2717 [ 772.808323] Code: 73 01 c3 48 8b 0d f9 76 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fff0cdd942261497fb8922a194b4da3315ae864
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52f72b3f8f6fa64abb71b711962b97f1f6aced1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a825691b804b35141aaf4eac91003a70846e316d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be3f38d05cc5a7c3f13e51994c5dd043ab604d28
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7af1b15c884ed12bb69da11aec095045d861ee8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e81446b559db4c98a6c2c5e039ac9cb23658432e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/memory.c",
            "tools/testing/selftests/mm/hmm-tests.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e81446b559db4c98a6c2c5e039ac9cb23658432e",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            },
            {
              "lessThan": "e7af1b15c884ed12bb69da11aec095045d861ee8",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            },
            {
              "lessThan": "a825691b804b35141aaf4eac91003a70846e316d",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            },
            {
              "lessThan": "2fff0cdd942261497fb8922a194b4da3315ae864",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            },
            {
              "lessThan": "52f72b3f8f6fa64abb71b711962b97f1f6aced1c",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            },
            {
              "lessThan": "be3f38d05cc5a7c3f13e51994c5dd043ab604d28",
              "status": "affected",
              "version": "999dad824c39ed14dee7c4412aae531ba9e74a90",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/memory.c",
            "tools/testing/selftests/mm/hmm-tests.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory: fix spurious warning when unmapping device-private/exclusive pages\n\nDevice private and exclusive entries are only supported for anonymous\nfolios.  This condition is tested in __migrate_device_pages() and\nmake_device_exclusive() using folio_test_anon().  However the unmap path\ntests this assumption using vma_is_anonymous().\n\nThis is wrong because whilst anonymous VMAs can only contain folios where\nfolio_test_anon() is true the opposite relation does not hold.  A folio\nfor which folio_test_anon() is true does not imply vma_is_anonymous() is\ntrue.  Such a condition can occur if for example a folio is part of a\nprivate filebacked mapping.\n\nIn this case vma_is_anonymous() is false as the mapping is filebacked, but\nfolio_test_anon() may be true, thus permitting devices to migrate the\nfolio to device private memory.  This can lead to the following spurious\nwarnings during process teardown:\n\n[  772.737706] ------------[ cut here ]------------\n[  772.739201] WARNING: mm/memory.c:1754 at unmap_page_range.cold+0x26/0x18a, CPU#17: hmm-tests/2041\n[  772.742050] Modules linked in: test_hmm nvidia_uvm(O) nvidia(O)\n[  772.743959] CPU: 17 UID: 0 PID: 2041 Comm: hmm-tests Tainted: G        W  O        7.0.0+ #387 PREEMPT(full)\n[  772.747104] Tainted: [W]=WARN, [O]=OOT_MODULE\n[  772.748509] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n[  772.752117] RIP: 0010:unmap_page_range.cold+0x26/0x18a\n[  772.753780] Code: 7e fe ff ff 48 89 4c 24 78 4c 89 44 24 38 e8 f2 ff b1 00 48 8b 4c 24 78 4c 8b 44 24 38 48 8b 44 24 18 48 83 78 48 00 74 04 90 \u003c0f\u003e 0b 90 48 89 ca b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a 80 3c 02\n[  772.759602] RSP: 0018:ffff888112607550 EFLAGS: 00010286\n[  772.761310] RAX: ffff88811bbf4dc0 RBX: dffffc0000000000 RCX: ffffea03e9bfffd8\n[  772.763583] RDX: 1ffff1102377e9c1 RSI: 0000000000000008 RDI: ffff88811bbf4e08\n[  772.765914] RBP: 0000000000000006 R08: ffff8881059f7448 R09: ffffed10224c0e68\n[  772.768184] R10: ffff888112607347 R11: 0000000000000001 R12: 0000000000000001\n[  772.770461] R13: ffffea03e9bfffc0 R14: ffff888112607908 R15: ffffea03e9bfffc0\n[  772.772782] FS:  00007f327caa2780(0000) GS:ffff888427b7d000(0000) knlGS:0000000000000000\n[  772.775328] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  772.777187] CR2: 00007f327ca89000 CR3: 00000001994d5000 CR4: 00000000000006f0\n[  772.779135] Call Trace:\n[  772.779792]  \u003cTASK\u003e\n[  772.780317]  ? dmirror_interval_invalidate+0x1a3/0x290 [test_hmm]\n[  772.781873]  ? vm_normal_page_pud+0x2b0/0x2b0\n[  772.782992]  ? __rwlock_init+0x150/0x150\n[  772.784006]  ? lock_release+0x216/0x2b0\n[  772.785008]  ? __mmu_notifier_invalidate_range_start+0x505/0x6e0\n[  772.786522]  ? lock_release+0x216/0x2b0\n[  772.787498]  ? unmap_single_vma+0xb6/0x210\n[  772.788573]  unmap_vmas+0x27d/0x520\n[  772.789506]  ? unmap_single_vma+0x210/0x210\n[  772.790607]  ? mas_update_gap.part.0+0x620/0x620\n[  772.791834]  unmap_region+0x19e/0x350\n[  772.792769]  ? remove_vma+0x130/0x130\n[  772.793684]  ? mas_alloc_nodes+0x1f2/0x300\n[  772.794730]  vms_complete_munmap_vmas+0x8c1/0xe20\n[  772.795926]  ? unmap_region+0x350/0x350\n[  772.796917]  do_vmi_align_munmap+0x36a/0x4e0\n[  772.798018]  ? lock_release+0x216/0x2b0\n[  772.799024]  ? vma_shrink+0x620/0x620\n[  772.799983]  do_vmi_munmap+0x150/0x2c0\n[  772.800939]  __vm_munmap+0x161/0x2c0\n[  772.801872]  ? expand_downwards+0xd60/0xd60\n[  772.802948]  ? clockevents_program_event+0x1ef/0x540\n[  772.804217]  ? lock_release+0x216/0x2b0\n[  772.805158]  __x64_sys_munmap+0x59/0x80\n[  772.805776]  do_syscall_64+0xfc/0x670\n[  772.806336]  ? irqentry_exit+0xda/0x580\n[  772.806976]  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n[  772.807772] RIP: 0033:0x7f327cbb2717\n[  772.808323] Code: 73 01 c3 48 8b 0d f9 76 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff\n---truncated---"
    }
  ],
  "id": "CVE-2026-64131",
  "lastModified": "2026-07-19T16:17:54.853",
  "metrics": {},
  "published": "2026-07-19T16:17:54.853",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2fff0cdd942261497fb8922a194b4da3315ae864"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52f72b3f8f6fa64abb71b711962b97f1f6aced1c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a825691b804b35141aaf4eac91003a70846e316d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be3f38d05cc5a7c3f13e51994c5dd043ab604d28"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e7af1b15c884ed12bb69da11aec095045d861ee8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e81446b559db4c98a6c2c5e039ac9cb23658432e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.