CVE-2025-21746

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-21746
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21746.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21746
Downstream
Related
Published
2025-02-27T02:12:18Z
Modified
2025-10-17T21:29:36.125597Z
Summary
Input: synaptics - fix crash when enabling pass-through port
Details

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

Input: synaptics - fix crash when enabling pass-through port

When enabling a pass-through port an interrupt might come before psmouse driver binds to the pass-through port. However synaptics sub-driver tries to access psmouse instance presumably associated with the pass-through port to figure out if only 1 byte of response or entire protocol packet needs to be forwarded to the pass-through port and may crash if psmouse instance has not been attached to the port yet.

Fix the crash by introducing open() and close() methods for the port and check if the port is open before trying to access psmouse instance. Because psmouse calls serio_open() only after attaching psmouse instance to serio port instance this prevents the potential crash.

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
100e16959c3ca8cb7be788ed3e2c5867481f35f6
Fixed
a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
100e16959c3ca8cb7be788ed3e2c5867481f35f6
Fixed
3e179d3f1ada963475395d81bfe91daef4d1a24c
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
100e16959c3ca8cb7be788ed3e2c5867481f35f6
Fixed
87da1ea93ec9f9f0004e5b12e78789bc94e360bf
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
100e16959c3ca8cb7be788ed3e2c5867481f35f6
Fixed
08bd5b7c9a2401faabdaa1472d45c7de0755fd7e

Affected versions

v6.*

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
v6.12.2
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
v6.3
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
v6.6.9
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

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                "173873407657453476426315345328360724604",
                "195764194983601801168264150636538679261",
                "102868308636793807850258092622360209768",
                "192268169930889753938337072671125753650",
                "30230810799448171185328560390232028911",
                "66243879887962508357951285213907414409",
                "250379066747166145941127559948214208488",
                "295557787401029681908108441913379865839",
                "184474890175620923369796990538806436052",
                "179544151242804104002131947848273074532"
            ]
        },
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "id": "CVE-2025-21746-ce2297c7",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@08bd5b7c9a2401faabdaa1472d45c7de0755fd7e",
        "signature_version": "v1",
        "target": {
            "function": "synaptics_pt_create",
            "file": "drivers/input/mouse/synaptics.c"
        },
        "digest": {
            "function_hash": "89420593357425281286179460588337905320",
            "length": 683.0
        },
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "id": "CVE-2025-21746-d60d9010",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c",
        "signature_version": "v1",
        "target": {
            "file": "drivers/input/mouse/synaptics.h"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "9604014915951862352430310282814108986",
                "161582058896162863091011774641386901586",
                "222621287561022046071024033300003443847",
                "175801150893191967011763801139907016098"
            ]
        },
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "id": "CVE-2025-21746-dff86f47",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@87da1ea93ec9f9f0004e5b12e78789bc94e360bf",
        "signature_version": "v1",
        "target": {
            "function": "synaptics_pt_create",
            "file": "drivers/input/mouse/synaptics.c"
        },
        "digest": {
            "function_hash": "89420593357425281286179460588337905320",
            "length": 683.0
        },
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "id": "CVE-2025-21746-f3fa4bf1",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@08bd5b7c9a2401faabdaa1472d45c7de0755fd7e",
        "signature_version": "v1",
        "target": {
            "function": "synaptics_process_byte",
            "file": "drivers/input/mouse/synaptics.c"
        },
        "digest": {
            "function_hash": "261346571883130167243172926223980322350",
            "length": 512.0
        },
        "deprecated": false
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.5.0
Fixed
6.6.80
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.17
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.3