{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-21931", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21931", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-04-01T15:41:01.055Z", "updatedAt": "2026-05-23T15:57:27.859Z", "importedAt": "2026-10-24T01:57:29.455Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio\n\nCommit b15c87263a69 (\"hwpoison, memory_hotplug: allow hwpoisoned pages to\nbe offlined) add page poison checks in do_migrate_range in order to make\noffline hwpoisoned page possible by introducing isolate_lru_page and\ntry_to_unmap for hwpoisoned page. However folio lock must be held before\ncalling try_to_unmap. Add it to fix this problem.\n\nWarning will be produced if folio is not locked during unmap:\n\n ------------[ cut here ]------------\n kernel BUG at ./include/linux/swapops.h:400!\n Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\n Modules linked in:\n CPU: 4 UID: 0 PID: 411 Comm: bash Tainted: G W 6.13.0-rc1-00016-g3c434c7ee82a-dirty #41\n Tainted: [W]=WARN\n Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : try_to_unmap_one+0xb08/0xd3c\n lr : try_to_unmap_one+0x3dc/0xd3c\n Call trace:\n try_to_unmap_one+0xb08/0xd3c (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 Code: f9407be0 b5fff320 d4210000 17ffff97 (d4210000)\n ---[ end trace 0000000000000000 ]---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b15c87263a69272423771118c653e9a1d0672caa", "status": "affected", "versionType": "git", "lessThan": "3926b572fd073491bde13ec42ee08ac1b337bf4d" }, { "version": "b15c87263a69272423771118c653e9a1d0672caa", "status": "affected", "versionType": "git", "lessThan": "93df6da64b004f75d307ed08d3f0f1020280d339" }, { "version": "b15c87263a69272423771118c653e9a1d0672caa", "status": "affected", "versionType": "git", "lessThan": "576a2f4c437c19bec7d05d05b5990f178d2b0f40" }, { "version": "b15c87263a69272423771118c653e9a1d0672caa", "status": "affected", "versionType": "git", "lessThan": "629dfc6ba5431056701d4e44830f3409b989955a" }, { "version": "b15c87263a69272423771118c653e9a1d0672caa", "status": "affected", "versionType": "git", "lessThan": "af288a426c3e3552b62595c6138ec6371a17dbba" }, { "version": "85ef35ab972b7484f41c3bb2bbc79de212e19129", "status": "affected", "versionType": "git" }, { "version": "060853fdd434ce620dd1dd7619ede834bd33b9d0", "status": "affected", "versionType": "git" }, { "version": "cb1206e85df291fefde27401190329e26996c54c", "status": "affected", "versionType": "git" }, { "version": "2c25071bed4b1f9c4cfb10a7914847d7069794bf", "status": "affected", "versionType": "git" }, { "version": "2c87072a3bf9bbcd747618bb2ccc3cd0da181db6", "status": "affected", "versionType": "git" }, { "version": "a2b977e3d9e4298d28ebe5cfff9e0859b74a7ac7", "status": "affected", "versionType": "git" }, { "version": "3.16.65", "status": "affected", "versionType": "semver", "lessThan": "3.17" }, { "version": "4.4.170", "status": "affected", "versionType": "semver", "lessThan": "4.5" }, { "version": "4.9.150", "status": "affected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.14.93", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.15", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "4.20.2", "status": "affected", "versionType": "semver", "lessThan": "4.21" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.0" }, { "version": "6.1.140", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.92", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.19", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }