CVE-2022-49560

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49560
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49560.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49560
Downstream
Related
Published
2025-02-26T02:14:05Z
Modified
2025-10-21T10:50:51.730193Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
exfat: check if cluster num is valid
Details

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

exfat: check if cluster num is valid

Syzbot reported slab-out-of-bounds read in exfatclearbitmap. This was triggered by reproducer calling truncute with size 0, which causes the following trace:

BUG: KASAN: slab-out-of-bounds in exfatclearbitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365

Call Trace: _dumpstack lib/dumpstack.c:77 [inline] dumpstacklvl+0x1e2/0x24b lib/dumpstack.c:118 printaddressdescription+0x81/0x3c0 mm/kasan/report.c:233 _kasanreport mm/kasan/report.c:419 [inline] kasanreport+0x1a4/0x1f0 mm/kasan/report.c:436 _asanreportload8noabort+0x14/0x20 mm/kasan/reportgeneric.c:309 exfatclearbitmap+0x147/0x490 fs/exfat/balloc.c:174 exfatfreecluster+0x25a/0x4a0 fs/exfat/fatent.c:181 _exfattruncate+0x99e/0xe00 fs/exfat/file.c:217 exfattruncate+0x11b/0x4f0 fs/exfat/file.c:243 exfatsetattr+0xa03/0xd40 fs/exfat/file.c:339 notifychange+0xb76/0xe10 fs/attr.c:336 dotruncate+0x1ea/0x2d0 fs/open.c:65

Move the isvalidcluster() helper from fatent.c to a common header to make it reusable in other *.c files. And add isvalidcluster() to validate if cluster number is within valid range in exfatclearbitmap() and exfatsetbitmap().

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
1e49a94cf707204b66a3fb242f2814712c941f52
Fixed
82f723b8a5adf497f9e34c702a30ca7298615654
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1e49a94cf707204b66a3fb242f2814712c941f52
Fixed
c504167adc3248095a905fa0700a9693897cb5ed
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1e49a94cf707204b66a3fb242f2814712c941f52
Fixed
7c58b14b6f9cde9f69e7fa053ab73f6e013a7131
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1e49a94cf707204b66a3fb242f2814712c941f52
Fixed
2193286402df2d9c53294f7a858d5e6fd7346e08
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1e49a94cf707204b66a3fb242f2814712c941f52
Fixed
64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d

Affected versions

v5.*

v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.10.1
v5.10.10
v5.10.100
v5.10.101
v5.10.102
v5.10.103
v5.10.104
v5.10.105
v5.10.106
v5.10.107
v5.10.108
v5.10.109
v5.10.11
v5.10.110
v5.10.111
v5.10.112
v5.10.113
v5.10.114
v5.10.115
v5.10.116
v5.10.117
v5.10.118
v5.10.119
v5.10.12
v5.10.13
v5.10.14
v5.10.15
v5.10.16
v5.10.17
v5.10.18
v5.10.19
v5.10.2
v5.10.20
v5.10.21
v5.10.22
v5.10.23
v5.10.24
v5.10.25
v5.10.26
v5.10.27
v5.10.28
v5.10.29
v5.10.3
v5.10.30
v5.10.31
v5.10.32
v5.10.33
v5.10.34
v5.10.35
v5.10.36
v5.10.37
v5.10.38
v5.10.39
v5.10.4
v5.10.40
v5.10.41
v5.10.42
v5.10.43
v5.10.44
v5.10.45
v5.10.46
v5.10.47
v5.10.48
v5.10.49
v5.10.5
v5.10.50
v5.10.51
v5.10.52
v5.10.53
v5.10.54
v5.10.55
v5.10.56
v5.10.57
v5.10.58
v5.10.59
v5.10.6
v5.10.60
v5.10.61
v5.10.62
v5.10.63
v5.10.64
v5.10.65
v5.10.66
v5.10.67
v5.10.68
v5.10.69
v5.10.7
v5.10.70
v5.10.71
v5.10.72
v5.10.73
v5.10.74
v5.10.75
v5.10.76
v5.10.77
v5.10.78
v5.10.79
v5.10.8
v5.10.80
v5.10.81
v5.10.82
v5.10.83
v5.10.84
v5.10.85
v5.10.86
v5.10.87
v5.10.88
v5.10.89
v5.10.9
v5.10.90
v5.10.91
v5.10.92
v5.10.93
v5.10.94
v5.10.95
v5.10.96
v5.10.97
v5.10.98
v5.10.99
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.5
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1
v5.17.10
v5.17.11
v5.17.12
v5.17.2
v5.17.3
v5.17.4
v5.17.5
v5.17.6
v5.17.7
v5.17.8
v5.17.9
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.6
v5.6-rc2
v5.6-rc3
v5.6-rc4
v5.6-rc5
v5.6-rc6
v5.6-rc7
v5.7
v5.7-rc1
v5.7-rc2
v5.7-rc3
v5.7-rc4
v5.7-rc5
v5.7-rc6
v5.7-rc7
v5.8
v5.8-rc1
v5.8-rc2
v5.8-rc3
v5.8-rc4
v5.8-rc5
v5.8-rc6
v5.8-rc7
v5.9
v5.9-rc1
v5.9-rc2
v5.9-rc3
v5.9-rc4
v5.9-rc5
v5.9-rc6
v5.9-rc7
v5.9-rc8

Database specific

vanir_signatures

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    {
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    {
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    },
    {
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        "signature_type": "Function",
        "digest": {
            "function_hash": "203913412098474897795480176069293745760",
            "length": 419.0
        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-a9d2bbf6",
        "target": {
            "file": "fs/exfat/exfat_fs.h"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
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                "301803991320815759581063656195278751290"
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        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-aaef719d",
        "target": {
            "function": "exfat_clear_bitmap",
            "file": "fs/exfat/balloc.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7c58b14b6f9cde9f69e7fa053ab73f6e013a7131",
        "signature_type": "Function",
        "digest": {
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            "length": 702.0
        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-b65239b2",
        "target": {
            "file": "fs/exfat/balloc.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7c58b14b6f9cde9f69e7fa053ab73f6e013a7131",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
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        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-b65de706",
        "target": {
            "function": "exfat_clear_bitmap",
            "file": "fs/exfat/balloc.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c504167adc3248095a905fa0700a9693897cb5ed",
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        "digest": {
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            "length": 702.0
        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-be16386b",
        "target": {
            "file": "fs/exfat/balloc.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d",
        "signature_type": "Line",
        "digest": {
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                "19147944137920836540483591669310528526"
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        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-ec692525",
        "target": {
            "file": "fs/exfat/exfat_fs.h"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@82f723b8a5adf497f9e34c702a30ca7298615654",
        "signature_type": "Line",
        "digest": {
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        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-ee7b5f81",
        "target": {
            "file": "fs/exfat/fatent.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
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                "302212570377464923894279619355664732197",
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                "26043358432727613854509846995364549352"
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        },
        "deprecated": false,
        "signature_version": "v1"
    },
    {
        "id": "CVE-2022-49560-efe1e224",
        "target": {
            "file": "fs/exfat/fatent.c"
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2193286402df2d9c53294f7a858d5e6fd7346e08",
        "signature_type": "Line",
        "digest": {
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                "320379944802331336643175459763657166597",
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                "26043358432727613854509846995364549352"
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        },
        "deprecated": false,
        "signature_version": "v1"
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.7.0
Fixed
5.10.120
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.45
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.17.13
Type
ECOSYSTEM
Events
Introduced
5.18.0
Fixed
5.18.2