CVE-2025-38172

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-38172
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38172.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38172
Downstream
Published
2025-07-03T08:36:10Z
Modified
2025-10-18T02:45:47.798443Z
Summary
erofs: avoid using multiple devices with different type
Details

In the Linux kernel, the following vulnerability has been resolved:

erofs: avoid using multiple devices with different type

For multiple devices, both primary and extra devices should be the same type. erofs_init_device has already guaranteed that if the primary is a file-backed device, extra devices should also be regular files.

However, if the primary is a block device while the extra device is a file-backed device, erofs_init_device will get an ENOTBLK, which is not treated as an error in erofs_fc_get_tree, and that leads to an UAF:

erofsfcgettree gettreebdevflags(erofsfcfillsuper) erofsreadsuperblock erofsinitdevice // sbi->dif0 is not inited yet, // return -ENOTBLK deactivatelockedsuper free(sbi) if (err is -ENOTBLK) sbi->dif0.file = filpopen() // sbi UAF

So if -ENOTBLK is hitted in erofs_init_device, it means the primary device must be a block device, and the extra device is not a block device. The error can be converted to -EINVAL.

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
fb176750266a3d7f42ebdcf28e8ba40350b27847
Fixed
65115472f741ca000d7ea4a5922214f93cd1516e
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
fb176750266a3d7f42ebdcf28e8ba40350b27847
Fixed
cd04beb9ce2773a16057248bb4fa424068ae3807
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
fb176750266a3d7f42ebdcf28e8ba40350b27847
Fixed
9748f2f54f66743ac77275c34886a9f890e18409

Affected versions

v6.*

v6.11
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
v6.12.4
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

Database specific

vanir_signatures

[
    {
        "id": "CVE-2025-38172-31e291f0",
        "deprecated": false,
        "digest": {
            "length": 1373.0,
            "function_hash": "179934217437853389915950967232845861772"
        },
        "target": {
            "file": "fs/erofs/super.c",
            "function": "erofs_init_device"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9748f2f54f66743ac77275c34886a9f890e18409",
        "signature_version": "v1",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2025-38172-389afc44",
        "deprecated": false,
        "digest": {
            "length": 1373.0,
            "function_hash": "179934217437853389915950967232845861772"
        },
        "target": {
            "file": "fs/erofs/super.c",
            "function": "erofs_init_device"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cd04beb9ce2773a16057248bb4fa424068ae3807",
        "signature_version": "v1",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2025-38172-6f5dfb2b",
        "deprecated": false,
        "digest": {
            "length": 1387.0,
            "function_hash": "116103684906645232437401598458549171618"
        },
        "target": {
            "file": "fs/erofs/super.c",
            "function": "erofs_init_device"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@65115472f741ca000d7ea4a5922214f93cd1516e",
        "signature_version": "v1",
        "signature_type": "Function"
    },
    {
        "id": "CVE-2025-38172-75b0b8d1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
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                "5338847901380570306155002562365792301",
                "99211175673006647044442294068155915222",
                "59683606506007078008947281108343889143"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "fs/erofs/super.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cd04beb9ce2773a16057248bb4fa424068ae3807",
        "signature_version": "v1",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2025-38172-8a16fc20",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "93896023460800140993078890913851437936",
                "234263658139618896240067322419426957989",
                "5338847901380570306155002562365792301",
                "99211175673006647044442294068155915222",
                "59683606506007078008947281108343889143"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "fs/erofs/super.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9748f2f54f66743ac77275c34886a9f890e18409",
        "signature_version": "v1",
        "signature_type": "Line"
    },
    {
        "id": "CVE-2025-38172-e4c1abab",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "93896023460800140993078890913851437936",
                "234263658139618896240067322419426957989",
                "5338847901380570306155002562365792301",
                "99211175673006647044442294068155915222",
                "59683606506007078008947281108343889143"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "fs/erofs/super.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@65115472f741ca000d7ea4a5922214f93cd1516e",
        "signature_version": "v1",
        "signature_type": "Line"
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.12.0
Fixed
6.12.34
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.15.3