{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64131", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.036Z", "datePublished": "2026-07-19T15:40:26.854Z", "dateUpdated": "2026-07-19T15:40:26.854Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:40:26.854Z"}, "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 <0f> 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] <TASK>\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 <48> 3d 01 f0 ff\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/memory.c", "tools/testing/selftests/mm/hmm-tests.c"], "versions": [{"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "e81446b559db4c98a6c2c5e039ac9cb23658432e", "status": "affected", "versionType": "git"}, {"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "e7af1b15c884ed12bb69da11aec095045d861ee8", "status": "affected", "versionType": "git"}, {"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "a825691b804b35141aaf4eac91003a70846e316d", "status": "affected", "versionType": "git"}, {"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "2fff0cdd942261497fb8922a194b4da3315ae864", "status": "affected", "versionType": "git"}, {"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "52f72b3f8f6fa64abb71b711962b97f1f6aced1c", "status": "affected", "versionType": "git"}, {"version": "999dad824c39ed14dee7c4412aae531ba9e74a90", "lessThan": "be3f38d05cc5a7c3f13e51994c5dd043ab604d28", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/memory.c", "tools/testing/selftests/mm/hmm-tests.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e81446b559db4c98a6c2c5e039ac9cb23658432e"}, {"url": "https://git.kernel.org/stable/c/e7af1b15c884ed12bb69da11aec095045d861ee8"}, {"url": "https://git.kernel.org/stable/c/a825691b804b35141aaf4eac91003a70846e316d"}, {"url": "https://git.kernel.org/stable/c/2fff0cdd942261497fb8922a194b4da3315ae864"}, {"url": "https://git.kernel.org/stable/c/52f72b3f8f6fa64abb71b711962b97f1f6aced1c"}, {"url": "https://git.kernel.org/stable/c/be3f38d05cc5a7c3f13e51994c5dd043ab604d28"}], "title": "mm/memory: fix spurious warning when unmapping device-private/exclusive pages", "x_generator": {"engine": "bippy-1.2.0"}}}}

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