CVE-2022-48874

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48874
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48874.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-48874
Downstream
Published
2024-08-21T06:10:05.081Z
Modified
2025-11-28T08:12:03.614922Z
Summary
misc: fastrpc: Fix use-after-free and race in fastrpc_map_find
Details

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

misc: fastrpc: Fix use-after-free and race in fastrpcmapfind

Currently, there is a race window between the point when the mutex is unlocked in fastrpcmaplookup and the reference count increasing (fastrpcmapget) in fastrpcmapfind, which can also lead to use-after-free.

So lets merge fastrpcmapfind into fastrpcmaplookup which allows us to both protect the maps list by also taking the &fl->lock spinlock and the reference count, since the spinlock will be released only after. Add take_ref argument to make this suitable for all callers.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48874.json"
}
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
8f6c1d8c4f0cc316b0456788fff8373554d1d99d
Fixed
a50c5c25b6e7d2824698c0e6385f882a18f4a498
Fixed
9446fa1683a7e3937d9970248ced427c1983a1c5

Affected versions

v5.*

v5.17
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
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
v6.1.2
v6.1.3
v6.1.4
v6.1.5
v6.1.6
v6.1.7
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_find",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "25382636931215770283091402321502232849",
            "length": 173.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a50c5c25b6e7d2824698c0e6385f882a18f4a498",
        "id": "CVE-2022-48874-2469a06b"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_create",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "70098770422086283728989420529450652834",
            "length": 1744.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a50c5c25b6e7d2824698c0e6385f882a18f4a498",
        "id": "CVE-2022-48874-2559977d"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_lookup",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "212788032905910240706554647753031311643",
            "length": 327.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9446fa1683a7e3937d9970248ced427c1983a1c5",
        "id": "CVE-2022-48874-3f056ac1"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_put_args",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "139100685527087836325827448984538680565",
            "length": 1022.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9446fa1683a7e3937d9970248ced427c1983a1c5",
        "id": "CVE-2022-48874-47f22104"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
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                "311391354362378480546746580529407683753",
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                "236566295803777506018595515021711153812",
                "221504062828588850203170742441964637470"
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            "threshold": 0.9
        },
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9446fa1683a7e3937d9970248ced427c1983a1c5",
        "id": "CVE-2022-48874-7ba6c343"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_find",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "25382636931215770283091402321502232849",
            "length": 173.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9446fa1683a7e3937d9970248ced427c1983a1c5",
        "id": "CVE-2022-48874-84441ce5"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_create",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "114091342169145420498116635221122115836",
            "length": 1744.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9446fa1683a7e3937d9970248ced427c1983a1c5",
        "id": "CVE-2022-48874-8480ad1f"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
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                "92234006976814572900888628768108342260",
                "171397231027535047146002515710202991826",
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                "154314684676688130399844563193436808134",
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                "117490221670940926609709528276110262386",
                "264714299152406554458088243256868677397",
                "216060184225491369083381032101423031317",
                "311391354362378480546746580529407683753",
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                "236566295803777506018595515021711153812",
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            "threshold": 0.9
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        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a50c5c25b6e7d2824698c0e6385f882a18f4a498",
        "id": "CVE-2022-48874-a47bf760"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_put_args",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
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            "length": 1022.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a50c5c25b6e7d2824698c0e6385f882a18f4a498",
        "id": "CVE-2022-48874-b6d0d2b6"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "function": "fastrpc_map_lookup",
            "file": "drivers/misc/fastrpc.c"
        },
        "digest": {
            "function_hash": "212788032905910240706554647753031311643",
            "length": 327.0
        },
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a50c5c25b6e7d2824698c0e6385f882a18f4a498",
        "id": "CVE-2022-48874-fbb10fe7"
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48874.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.18.0
Fixed
6.1.8

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48874.json"