CVE-2025-22015
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-22015
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-22015.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-22015
- Downstream
- Related
- Published
- 2025-04-08T08:18:05.287Z
- Modified
- 2025-11-20T08:52:29.566532Z
- Summary
- mm/migrate: fix shmem xarray update during migration
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mm/migrate: fix shmem xarray update during migration
A shmem folio can be either in page cache or in swap cache, but not at the same time. Namely, once it is in swap cache, folio->mapping should be NULL, and the folio is no longer in a shmem mapping.
In _foliomigratemapping(), to determine the number of xarray entries to update, foliotestswapbacked() is used, but that conflates shmem in page cache case and shmem in swap cache case. It leads to xarray multi-index entry corruption, since it turns a sibling entry to a normal entry during xasstore() (see [1] for a userspace reproduction). Fix it by only using foliotestswapcache() to determine whether xarray is storing swap cache entries or not to choose the right number of xarray entries to update.
[1] https://lore.kernel.org/linux-mm/Z8idPCkaJW1IChjT@casper.infradead.org/
Note: In _splithugepage(), foliotestanon() && foliotestswapcache() is used to get swapcache address space, but that ignores the shmem folio in swap cache case. It could lead to NULL pointer dereferencing when a in-swap-cache shmem folio is split at _xastore(), since !foliotestanon() is true and folio->mapping is NULL. But fortunately, its caller splithugepagetolisttoorder() bails out early with EBUSY when folio->mapping is NULL. So no need to take care of it here.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/29124ae980e2860f0eec7355949d3d3292ee81da
- https://git.kernel.org/stable/c/49100c0b070e900f87c8fac3be9b9ef8a30fa673
- https://git.kernel.org/stable/c/60cf233b585cdf1f3c5e52d1225606b86acd08b0
- https://git.kernel.org/stable/c/75cfb92eb63298d717b6b0118f91ba12c4fcfeb5
- https://git.kernel.org/stable/c/c057ee03f751d6cecf7ee64f52f6545d94082aaa
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbe72d197b2281e2ee3f28017fc9be1ab17e26d16Fixed49100c0b070e900f87c8fac3be9b9ef8a30fa673
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced07550b1461d4d0499165e7d6f7718cfd0e440427Fixed29124ae980e2860f0eec7355949d3d3292ee81da
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfc346d0a70a13d52fe1c4bc49516d83a42cd7c4cFixedc057ee03f751d6cecf7ee64f52f6545d94082aaa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfc346d0a70a13d52fe1c4bc49516d83a42cd7c4cFixed75cfb92eb63298d717b6b0118f91ba12c4fcfeb5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfc346d0a70a13d52fe1c4bc49516d83a42cd7c4cFixed60cf233b585cdf1f3c5e52d1225606b86acd08b0
Affected versions
v6.*
v6.1.100
v6.1.101
v6.1.102
v6.1.103
v6.1.104
v6.1.105
v6.1.106
v6.1.107
v6.1.108
v6.1.109
v6.1.110
v6.1.111
v6.1.112
v6.1.113
v6.1.114
v6.1.115
v6.1.116
v6.1.117
v6.1.118
v6.1.119
v6.1.120
v6.1.121
v6.1.122
v6.1.123
v6.1.124
v6.1.125
v6.1.126
v6.1.127
v6.1.128
v6.1.129
v6.1.130
v6.1.131
v6.1.71
v6.1.72
v6.1.73
v6.1.74
v6.1.75
v6.1.76
v6.1.77
v6.1.78
v6.1.79
v6.1.80
v6.1.81
v6.1.82
v6.1.83
v6.1.84
v6.1.85
v6.1.86
v6.1.87
v6.1.88
v6.1.89
v6.1.90
v6.1.91
v6.1.92
v6.1.93
v6.1.94
v6.1.95
v6.1.96
v6.1.97
v6.1.98
v6.1.99
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.20
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.13.6
v6.13.7
v6.13.8
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.20
v6.6.21
v6.6.22
v6.6.23
v6.6.24
v6.6.25
v6.6.26
v6.6.27
v6.6.28
v6.6.29
v6.6.30
v6.6.31
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.40
v6.6.41
v6.6.42
v6.6.43
v6.6.44
v6.6.45
v6.6.46
v6.6.47
v6.6.48
v6.6.49
v6.6.50
v6.6.51
v6.6.52
v6.6.53
v6.6.54
v6.6.55
v6.6.56
v6.6.57
v6.6.58
v6.6.59
v6.6.60
v6.6.61
v6.6.62
v6.6.63
v6.6.64
v6.6.65
v6.6.66
v6.6.67
v6.6.68
v6.6.69
v6.6.70
v6.6.71
v6.6.72
v6.6.73
v6.6.74
v6.6.75
v6.6.76
v6.6.77
v6.6.78
v6.6.79
v6.6.80
v6.6.81
v6.6.82
v6.6.83
v6.6.84
v6.7
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "mm/migrate.c",
"function": "folio_migrate_mapping"
},
"digest": {
"length": 2088.0,
"function_hash": "14923251138126787591266845793489643923"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@29124ae980e2860f0eec7355949d3d3292ee81da",
"signature_version": "v1",
"id": "CVE-2025-22015-2989e7ec"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "mm/migrate.c"
},
"digest": {
"line_hashes": [
"37612668259392328594190852947169002078",
"121280602470159722539462775450936557783",
"142925461774925487966035682164757878494",
"97290462430729386282938790464251750422",
"274541637442175484516827304745207653387",
"128555236087656153539985504925011928824",
"192675872259342200560033057107078715253",
"52114491988426708411157974175991130018",
"24998623503374693168489341785877135712",
"222802203856230918907218558150531995318",
"320941404560494691802971149630446628095",
"153621442200892052033372588310879214074"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@29124ae980e2860f0eec7355949d3d3292ee81da",
"signature_version": "v1",
"id": "CVE-2025-22015-42391fef"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "mm/migrate.c",
"function": "__folio_migrate_mapping"
},
"digest": {
"length": 2388.0,
"function_hash": "49494306931211139082726422742379205110"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c057ee03f751d6cecf7ee64f52f6545d94082aaa",
"signature_version": "v1",
"id": "CVE-2025-22015-8fbd106a"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "mm/migrate.c"
},
"digest": {
"line_hashes": [
"125113778028472090664174069581033628678",
"37629740680160432707877049550942951832",
"142925461774925487966035682164757878494",
"97290462430729386282938790464251750422",
"274541637442175484516827304745207653387",
"128555236087656153539985504925011928824",
"192675872259342200560033057107078715253",
"52114491988426708411157974175991130018",
"24998623503374693168489341785877135712",
"222802203856230918907218558150531995318",
"320941404560494691802971149630446628095",
"153621442200892052033372588310879214074"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c057ee03f751d6cecf7ee64f52f6545d94082aaa",
"signature_version": "v1",
"id": "CVE-2025-22015-92eaf490"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "mm/migrate.c",
"function": "folio_migrate_mapping"
},
"digest": {
"length": 2063.0,
"function_hash": "189246379524580923976876462192890086343"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@49100c0b070e900f87c8fac3be9b9ef8a30fa673",
"signature_version": "v1",
"id": "CVE-2025-22015-cb0975c8"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "mm/migrate.c"
},
"digest": {
"line_hashes": [
"37612668259392328594190852947169002078",
"121280602470159722539462775450936557783",
"142925461774925487966035682164757878494",
"1958554645348204387113528015978729441",
"102918657139844465079313186198241105084",
"123738176857762766292426972244576484874",
"217484449045451916753400574658486660192",
"175795204337953749343501060152073310435",
"254977215484652111907794198192372045964",
"111954246982197103419918288211500350412",
"245611243555615940140816568896064473360",
"24998623503374693168489341785877135712",
"222802203856230918907218558150531995318",
"320941404560494691802971149630446628095",
"153621442200892052033372588310879214074"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@49100c0b070e900f87c8fac3be9b9ef8a30fa673",
"signature_version": "v1",
"id": "CVE-2025-22015-f48269ec"
}
]