CVE-2025-21931
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio
In the Linux kernel, the following vulnerability has been resolved: hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio Commit b15c87263a69 ("hwpoison, memory_hotplug: allow hwpoisoned pages to be offlined) add page poison checks in do_migrate_range in order to make offline hwpoisoned page possible by introducing isolate_lru_page and try_to_unmap for hwpoisoned page. However folio lock must be held before calling try_to_unmap. Add it to fix this problem. Warning will be produced if folio is not locked during unmap: ------------[ cut here ]------------ kernel BUG at ./include/linux/swapops.h:400! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 4 UID: 0 PID: 411 Comm: bash Tainted: G W 6.13.0-rc1-00016-g3c434c7ee82a-dirty #41 Tainted: [W]=WARN Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : try_to_unmap_one+0xb08/0xd3c lr : try_to_unmap_one+0x3dc/0xd3c Call trace: try_to_unmap_one+0xb08/0xd3c (P) try_to_unmap_one+0x3dc/0xd3c (L) rmap_walk_anon+0xdc/0x1f8 rmap_walk+0x3c/0x58 try_to_unmap+0x88/0x90 unmap_poisoned_folio+0x30/0xa8 do_migrate_range+0x4a0/0x568 offline_pages+0x5a4/0x670 memory_block_action+0x17c/0x374 memory_subsys_offline+0x3c/0x78 device_offline+0xa4/0xd0 state_store+0x8c/0xf0 dev_attr_store+0x18/0x2c sysfs_kf_write+0x44/0x54 kernfs_fop_write_iter+0x118/0x1a8 vfs_write+0x3a8/0x4bc ksys_write+0x6c/0xf8 __arm64_sys_write+0x1c/0x28 invoke_syscall+0x44/0x100 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x30/0xd0 el0t_64_sync_handler+0xc8/0xcc el0t_64_sync+0x198/0x19c Code: f9407be0 b5fff320 d4210000 17ffff97 (d4210000) ---[ end trace 0000000000000000 ]---
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| b15c87263a69272423771118c653e9a1d0672caa | affected | git | 3926b572fd073491bde13ec42ee08ac1b337bf4d | Unavailable | None listed |
| b15c87263a69272423771118c653e9a1d0672caa | affected | git | 93df6da64b004f75d307ed08d3f0f1020280d339 | Unavailable | None listed |
| b15c87263a69272423771118c653e9a1d0672caa | affected | git | 576a2f4c437c19bec7d05d05b5990f178d2b0f40 | Unavailable | None listed |
| b15c87263a69272423771118c653e9a1d0672caa | affected | git | 629dfc6ba5431056701d4e44830f3409b989955a | Unavailable | None listed |
| b15c87263a69272423771118c653e9a1d0672caa | affected | git | af288a426c3e3552b62595c6138ec6371a17dbba | Unavailable | None listed |
| 85ef35ab972b7484f41c3bb2bbc79de212e19129 | affected | git | Unavailable | Unavailable | None listed |
| 060853fdd434ce620dd1dd7619ede834bd33b9d0 | affected | git | Unavailable | Unavailable | None listed |
| cb1206e85df291fefde27401190329e26996c54c | affected | git | Unavailable | Unavailable | None listed |
| 2c25071bed4b1f9c4cfb10a7914847d7069794bf | affected | git | Unavailable | Unavailable | None listed |
| 2c87072a3bf9bbcd747618bb2ccc3cd0da181db6 | affected | git | Unavailable | Unavailable | None listed |
| a2b977e3d9e4298d28ebe5cfff9e0859b74a7ac7 | affected | git | Unavailable | Unavailable | None listed |
| 3.16.65 | affected | semver | 3.17 | Unavailable | None listed |
| 4.4.170 | affected | semver | 4.5 | Unavailable | None listed |
| 4.9.150 | affected | semver | 4.10 | Unavailable | None listed |
| 4.14.93 | affected | semver | 4.15 | Unavailable | None listed |
| 4.19.15 | affected | semver | 4.20 | Unavailable | None listed |
| 4.20.2 | affected | semver | 4.21 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.0 | Unavailable | None listed |
| 6.1.140 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.92 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.19 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.7 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |