{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-21907", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.786Z", "datePublished": "2025-04-01T15:40:47.576Z", "dateUpdated": "2026-05-23T15:57:25.876Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:57:25.876Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: memory-failure: update ttu flag inside unmap_poisoned_folio\n\nPatch series \"mm: memory_failure: unmap poisoned folio during migrate\nproperly\", v3.\n\nFix two bugs during folio migration if the folio is poisoned.\n\n\nThis patch (of 3):\n\nCommit 6da6b1d4a7df (\"mm/hwpoison: convert TTU_IGNORE_HWPOISON to\nTTU_HWPOISON\") introduce TTU_HWPOISON to replace TTU_IGNORE_HWPOISON in\norder to stop send SIGBUS signal when accessing an error page after a\nmemory error on a clean folio. However during page migration, anon folio\nmust be set with TTU_HWPOISON during unmap_*(). For pagecache we need\nsome policy just like the one in hwpoison_user_mappings to set this flag. \nSo move this policy from hwpoison_user_mappings to unmap_poisoned_folio to\nhandle this warning properly.\n\nWarning will be produced during unamp poison folio with the following log:\n\n ------------[ cut here ]------------\n WARNING: CPU: 1 PID: 365 at mm/rmap.c:1847 try_to_unmap_one+0x8fc/0xd3c\n Modules linked in:\n CPU: 1 UID: 0 PID: 365 Comm: bash Tainted: G W 6.13.0-rc1-00018-gacdb4bbda7ab #42\n Tainted: [W]=WARN\n Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : try_to_unmap_one+0x8fc/0xd3c\n lr : try_to_unmap_one+0x3dc/0xd3c\n Call trace:\n try_to_unmap_one+0x8fc/0xd3c (P)\n try_to_unmap_one+0x3dc/0xd3c (L)\n rmap_walk_anon+0xdc/0x1f8\n rmap_walk+0x3c/0x58\n try_to_unmap+0x88/0x90\n unmap_poisoned_folio+0x30/0xa8\n do_migrate_range+0x4a0/0x568\n offline_pages+0x5a4/0x670\n memory_block_action+0x17c/0x374\n memory_subsys_offline+0x3c/0x78\n device_offline+0xa4/0xd0\n state_store+0x8c/0xf0\n dev_attr_store+0x18/0x2c\n sysfs_kf_write+0x44/0x54\n kernfs_fop_write_iter+0x118/0x1a8\n vfs_write+0x3a8/0x4bc\n ksys_write+0x6c/0xf8\n __arm64_sys_write+0x1c/0x28\n invoke_syscall+0x44/0x100\n el0_svc_common.constprop.0+0x40/0xe0\n do_el0_svc+0x1c/0x28\n el0_svc+0x30/0xd0\n el0t_64_sync_handler+0xc8/0xcc\n el0t_64_sync+0x198/0x19c\n ---[ end trace 0000000000000000 ]---\n\n[mawupeng1@huawei.com: unmap_poisoned_folio(): remove shadowed local `mapping', per Miaohe]" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/internal.h", "mm/memory-failure.c", "mm/memory_hotplug.c" ], "versions": [ { "version": "6da6b1d4a7df8c35770186b53ef65d388398e139", "lessThan": "608cc7deb428f1122ed426060233622ebf667b6e", "status": "affected", "versionType": "git" }, { "version": "6da6b1d4a7df8c35770186b53ef65d388398e139", "lessThan": "425c12c076e6fc6b2cb04b9f960319d31dcabc76", "status": "affected", "versionType": "git" }, { "version": "6da6b1d4a7df8c35770186b53ef65d388398e139", "lessThan": "b81679b1633aa43c0d973adfa816d78c1ed0d032", "status": "affected", "versionType": "git" }, { "version": "deab8114fb67dcb0e6293b665c3c7083fbadff17", "status": "affected", "versionType": "git" }, { "version": "6dcf132fe236045bd7f50c008660ea086d09af1f", "status": "affected", "versionType": "git" }, { "version": "6.1.16", "lessThan": "6.2", "status": "affected", "versionType": "semver" }, { "version": "6.2.3", "lessThan": "6.3", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/internal.h", "mm/memory-failure.c", "mm/memory_hotplug.c" ], "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.19", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.7", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "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": "6.3", "versionEndExcluding": "6.12.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.13.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/608cc7deb428f1122ed426060233622ebf667b6e" }, { "url": "https://git.kernel.org/stable/c/425c12c076e6fc6b2cb04b9f960319d31dcabc76" }, { "url": "https://git.kernel.org/stable/c/b81679b1633aa43c0d973adfa816d78c1ed0d032" } ], "title": "mm: memory-failure: update ttu flag inside unmap_poisoned_folio", "x_generator": { "engine": "bippy-1.2.0" } } } }