CVE-2025-38396

Export anoninodemakesecureinode() to allow KVM guestmemfd to create anonymous inodes with proper security context. This replaces the current pattern of calling allocanoninode() followed by inodeinitsecurityanon() for creating security context manually.

This change also fixes a security regression in secretmem where the SPRIVATE flag was not cleared after allocanon_inode(), causing LSM/SELinux checks to be bypassed for secretmem file descriptors.

As guestmemfd currently resides in the KVM module, we need to export this symbol for use outside the core kernel. In the future, guestmemfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear.

References

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: Introduced

2bfe15c5261212130f1a71f32a300bcf426443d4

Fixed

66d29d757c968d2bee9124816da5d718eb352959

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

2bfe15c5261212130f1a71f32a300bcf426443d4

Fixed

e3eed01347721cd7a8819568161c91d538fbf229

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

2bfe15c5261212130f1a71f32a300bcf426443d4

Fixed

f94c422157f3e43dd31990567b3e5d54b3e5b32b

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

2bfe15c5261212130f1a71f32a300bcf426443d4

Fixed

6ca45ea48530332a4ba09595767bd26d3232743b

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

2bfe15c5261212130f1a71f32a300bcf426443d4

Fixed

cbe4134ea4bc493239786220bd69cb8a13493190

Affected versions

v5.*

v5.19

v5.19-rc2

v5.19-rc3

v5.19-rc4

v5.19-rc5

v5.19-rc6

v5.19-rc7

v5.19-rc8

v6.*

v6.0

v6.0-rc1

v6.0-rc2

v6.0-rc3

v6.0-rc4

v6.0-rc5

v6.0-rc6

v6.0-rc7

v6.1

v6.1-rc1

v6.1-rc2

v6.1-rc3

v6.1-rc4

v6.1-rc5

v6.1-rc6

v6.1-rc7

v6.1-rc8

v6.1.1

v6.1.10

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

v6.1.11

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

v6.1.12

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

v6.1.13

v6.1.130

v6.1.131

v6.1.132

v6.1.133

v6.1.134

v6.1.135

v6.1.136

v6.1.137

v6.1.138

v6.1.139

v6.1.14

v6.1.140

v6.1.141

v6.1.142

v6.1.143

v6.1.144

v6.1.145

v6.1.15

v6.1.16

v6.1.17

v6.1.18

v6.1.19

v6.1.2

v6.1.20

v6.1.21

v6.1.22

v6.1.23

v6.1.24

v6.1.25

v6.1.26

v6.1.27

v6.1.28

v6.1.29

v6.1.3

v6.1.30

v6.1.31

v6.1.32

v6.1.33

v6.1.34

v6.1.35

v6.1.36

v6.1.37

v6.1.38

v6.1.39

v6.1.4

v6.1.40

v6.1.41

v6.1.42

v6.1.43

v6.1.44

v6.1.45

v6.1.46

v6.1.47

v6.1.48

v6.1.49

v6.1.5

v6.1.50

v6.1.51

v6.1.52

v6.1.53

v6.1.54

v6.1.55

v6.1.56

v6.1.57

v6.1.58

v6.1.59

v6.1.6

v6.1.60

v6.1.61

v6.1.62

v6.1.63

v6.1.64

v6.1.65

v6.1.66

v6.1.67

v6.1.68

v6.1.69

v6.1.7

v6.1.70

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

v6.1.8

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

v6.1.9

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

v6.12.21

v6.12.22

v6.12.23

v6.12.24

v6.12.25

v6.12.26

v6.12.27

v6.12.28

v6.12.29

v6.12.3

v6.12.30

v6.12.31

v6.12.32

v6.12.33

v6.12.34

v6.12.35

v6.12.36

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

v6.14

v6.14-rc1

v6.14-rc2

v6.14-rc3

v6.14-rc4

v6.14-rc5

v6.14-rc6

v6.14-rc7

v6.15

v6.15-rc1

v6.15-rc2

v6.15-rc3

v6.15-rc4

v6.15-rc5

v6.15-rc6

v6.15-rc7

v6.15.1

v6.15.2

v6.15.3

v6.15.4

v6.15.5

v6.16-rc1

v6.16-rc2

v6.2

v6.2-rc1

v6.2-rc2

v6.2-rc3

v6.2-rc4

v6.2-rc5

v6.2-rc6

v6.2-rc7

v6.2-rc8

v6.3

v6.3-rc1

v6.3-rc2

v6.3-rc3

v6.3-rc4

v6.3-rc5

v6.3-rc6

v6.3-rc7

v6.4

v6.4-rc1

v6.4-rc2

v6.4-rc3

v6.4-rc4

v6.4-rc5

v6.4-rc6

v6.4-rc7

v6.5

v6.5-rc1

v6.5-rc2

v6.5-rc3

v6.5-rc4

v6.5-rc5

v6.5-rc6

v6.5-rc7

v6.6

v6.6-rc1

v6.6-rc2

v6.6-rc3

v6.6-rc4

v6.6-rc5

v6.6-rc6

v6.6-rc7

v6.6.1

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

v6.6.2

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

v6.6.3

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

v6.6.4

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

v6.6.5

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

v6.6.6

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

v6.6.7

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

v6.6.8

v6.6.80

v6.6.81

v6.6.82

v6.6.83

v6.6.84

v6.6.85

v6.6.86

v6.6.87

v6.6.88

v6.6.89

v6.6.9

v6.6.90

v6.6.91

v6.6.92

v6.6.93

v6.6.94

v6.6.95

v6.6.96

v6.7

v6.7-rc1

v6.7-rc2

v6.7-rc3

v6.7-rc4

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_version": "v1",
        "deprecated": false,
        "target": {
            "file": "include/linux/fs.h"
        },
        "digest": {
            "line_hashes": [
                "207726819013541388511098376761365913198",
                "273002786557251893163822353844911930250",
                "119939327220714794194032301263592176107",
                "241985726690896441920134635240954445571"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Line",
        "id": "CVE-2025-38396-23598578"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "anon_inode_make_secure_inode",
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "function_hash": "338847357121277572140676992255266683980",
            "length": 382.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Function",
        "id": "CVE-2025-38396-4efe05c4"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "line_hashes": [
                "202726532247333856193166854722395709245",
                "207985551313559522811487555458448319354",
                "49397199051395961248565704746577749244",
                "41543260459111431336597802015482263800",
                "161745298754163086815969551380423531521",
                "305488507391409185586087428623209491905",
                "221599381873476308005553480474690527575",
                "38671309219832592338256294407028634164",
                "191274980145167909327694094569985557675",
                "141235748443217275302515387476579924696",
                "212209605849480621429239741622825305287",
                "120974891556351091136408239759982463385",
                "245352666674311630124129846392773416574",
                "53195259890004814827315121410582880125",
                "37880545291076053375053168470322858753",
                "82795278929151027684233610967709595619",
                "317675401479096001053574902973865211561",
                "161117307828351305650783879120412328754"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Line",
        "id": "CVE-2025-38396-53e1d70e"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "anon_inode_make_secure_inode",
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "function_hash": "46358320037710069693825722760916002249",
            "length": 387.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Function",
        "id": "CVE-2025-38396-891cc6b4"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "__anon_inode_getfile",
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "function_hash": "317383122731748026325912050487821673185",
            "length": 786.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Function",
        "id": "CVE-2025-38396-8a354582"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "mm/secretmem.c"
        },
        "digest": {
            "line_hashes": [
                "216335622451477151513000161096908227094",
                "235721513737858809352334670660425681325",
                "127801396403787769775982171608095369875",
                "117310897637701415992797625333630358194",
                "319830109213997899646641305153015621304",
                "332130743295659499743751020074810182169",
                "322759496747919253159581125829775866723",
                "322771705113763245555130642964085943802",
                "110899355897169672194459964332261435976",
                "83569519560985040706773524979518867510",
                "252561431908932375657126763735683195981",
                "59974075689819414394892124179600197219"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Line",
        "id": "CVE-2025-38396-8ded544a"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "include/linux/fs.h"
        },
        "digest": {
            "line_hashes": [
                "278542020903518667180077692092152691066",
                "184687390549678345549010836381321926918",
                "187292549237263686132833786067626341359",
                "122531036811374890699403008944502603246"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Line",
        "id": "CVE-2025-38396-9f652bde"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "secretmem_file_create",
            "file": "mm/secretmem.c"
        },
        "digest": {
            "function_hash": "9146107283012255051361014157227253944",
            "length": 735.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Function",
        "id": "CVE-2025-38396-a49d1f5a"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "secretmem_file_create",
            "file": "mm/secretmem.c"
        },
        "digest": {
            "function_hash": "247158451956034610087899683252937030292",
            "length": 778.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Function",
        "id": "CVE-2025-38396-ac93fe30"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "__anon_inode_getfile",
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "function_hash": "317383122731748026325912050487821673185",
            "length": 786.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cbe4134ea4bc493239786220bd69cb8a13493190",
        "signature_type": "Function",
        "id": "CVE-2025-38396-b6730662"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "mm/secretmem.c"
        },
        "digest": {
            "line_hashes": [
                "51044642952895111223965532216070647536",
                "193020039974860973132105420744119240214",
                "141901971250339994220577222659869521011",
                "56403245935948420984971900974784006411",
                "117310897637701415992797625333630358194",
                "30250683439519690504405318258377898324",
                "17765705201165935014761394169715759287",
                "69244568148145581055182975874603282881",
                "330955056616686273313963026648789739252",
                "110899355897169672194459964332261435976",
                "83569519560985040706773524979518867510",
                "252561431908932375657126763735683195981",
                "59974075689819414394892124179600197219"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Line",
        "id": "CVE-2025-38396-baa550a4"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "fs/anon_inodes.c"
        },
        "digest": {
            "line_hashes": [
                "202726532247333856193166854722395709245",
                "207985551313559522811487555458448319354",
                "49397199051395961248565704746577749244",
                "41543260459111431336597802015482263800",
                "161745298754163086815969551380423531521",
                "6741026106160597920880681267167450651",
                "28628907984578163400781109544867519312",
                "8183179108087397168271912699830956492",
                "69469417920981794921692134207666103780",
                "191274980145167909327694094569985557675",
                "141235748443217275302515387476579924696",
                "212209605849480621429239741622825305287",
                "120974891556351091136408239759982463385",
                "245352666674311630124129846392773416574",
                "53195259890004814827315121410582880125",
                "25698330599883587756663528205536484023",
                "168995733753993067682521407079943274352",
                "276710705997582279010490200848168821322",
                "161117307828351305650783879120412328754"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3eed01347721cd7a8819568161c91d538fbf229",
        "signature_type": "Line",
        "id": "CVE-2025-38396-cb3d2798"
    }
]

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

6.0.0

Fixed

6.1.146

Type: ECOSYSTEM
Events: Introduced

6.2.0

Fixed

6.6.97

Type: ECOSYSTEM
Events: Introduced

6.7.0

Fixed

6.12.37

Type: ECOSYSTEM
Events: Introduced

6.13.0

Fixed

6.15.6