CVE-2022-49640
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49640
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49640.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49640
- Downstream
- Related
- Published
- 2025-02-26T02:23:48Z
- Modified
- 2025-10-15T23:17:37.987115Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- sysctl: Fix data races in proc_douintvec_minmax().
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
sysctl: Fix data races in procdouintvecminmax().
A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing.
This patch changes procdouintvecminmax() to use READONCE() and WRITEONCE() internally to fix data-races on the sysctl side. For now, procdouintvecminmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1
- https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea
- https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293
- https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df
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
-
Introduced61d9b56a89208d8cccd0b4cfec7e6959717e16e3Fixede3a2144b3b6bf9ecafd91087c8b8b48171ec19df
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced61d9b56a89208d8cccd0b4cfec7e6959717e16e3Fixed40e0477a7371d101c55b69d9c32a7a1ed82ab5ea
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced61d9b56a89208d8cccd0b4cfec7e6959717e16e3Fixedb60eddf98b9716651069dfda296c91311a7a6293
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced61d9b56a89208d8cccd0b4cfec7e6959717e16e3Fixed2d3b559df3ed39258737789aae2ae7973d205bc1
Affected versions
v4.*
v4.13
v4.13-rc1
v4.13-rc2
v4.13-rc3
v4.13-rc4
v4.13-rc5
v4.13-rc6
v4.13-rc7
v4.14
v4.14-rc1
v4.14-rc2
v4.14-rc3
v4.14-rc4
v4.14-rc5
v4.14-rc6
v4.14-rc7
v4.14-rc8
v4.15
v4.15-rc1
v4.15-rc2
v4.15-rc3
v4.15-rc4
v4.15-rc5
v4.15-rc6
v4.15-rc7
v4.15-rc8
v4.15-rc9
v4.16
v4.16-rc1
v4.16-rc2
v4.16-rc3
v4.16-rc4
v4.16-rc5
v4.16-rc6
v4.16-rc7
v4.17
v4.17-rc1
v4.17-rc2
v4.17-rc3
v4.17-rc4
v4.17-rc5
v4.17-rc6
v4.17-rc7
v4.18
v4.18-rc1
v4.18-rc2
v4.18-rc3
v4.18-rc4
v4.18-rc5
v4.18-rc6
v4.18-rc7
v4.18-rc8
v4.19
v4.19-rc1
v4.19-rc2
v4.19-rc3
v4.19-rc4
v4.19-rc5
v4.19-rc6
v4.19-rc7
v4.19-rc8
v4.20
v4.20-rc1
v4.20-rc2
v4.20-rc3
v4.20-rc4
v4.20-rc5
v4.20-rc6
v4.20-rc7
v5.*
v5.0
v5.0-rc1
v5.0-rc2
v5.0-rc3
v5.0-rc4
v5.0-rc5
v5.0-rc6
v5.0-rc7
v5.0-rc8
v5.1
v5.1-rc1
v5.1-rc2
v5.1-rc3
v5.1-rc4
v5.1-rc5
v5.1-rc6
v5.1-rc7
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
v5.10.120
v5.10.121
v5.10.122
v5.10.123
v5.10.124
v5.10.125
v5.10.126
v5.10.127
v5.10.128
v5.10.129
v5.10.13
v5.10.130
v5.10.131
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
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
v5.15.51
v5.15.52
v5.15.53
v5.15.54
v5.15.55
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
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.10
v5.18.11
v5.18.12
v5.18.2
v5.18.3
v5.18.4
v5.18.5
v5.18.6
v5.18.7
v5.18.8
v5.18.9
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.2
v5.2-rc1
v5.2-rc2
v5.2-rc3
v5.2-rc4
v5.2-rc5
v5.2-rc6
v5.2-rc7
v5.3
v5.3-rc1
v5.3-rc2
v5.3-rc3
v5.3-rc4
v5.3-rc5
v5.3-rc6
v5.3-rc7
v5.3-rc8
v5.4
v5.4-rc1
v5.4-rc2
v5.4-rc3
v5.4-rc4
v5.4-rc5
v5.4-rc6
v5.4-rc7
v5.4-rc8
v5.5
v5.5-rc1
v5.5-rc2
v5.5-rc3
v5.5-rc4
v5.5-rc5
v5.5-rc6
v5.5-rc7
v5.6
v5.6-rc1
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
[
{
"id": "CVE-2022-49640-0cb02499",
"signature_type": "Function",
"signature_version": "v1",
"target": {
"function": "do_proc_douintvec_minmax_conv",
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b60eddf98b9716651069dfda296c91311a7a6293",
"deprecated": false,
"digest": {
"length": 428.0,
"function_hash": "145152170518865989254362898586485218502"
}
},
{
"id": "CVE-2022-49640-3a5f3775",
"signature_type": "Line",
"signature_version": "v1",
"target": {
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b60eddf98b9716651069dfda296c91311a7a6293",
"deprecated": false,
"digest": {
"line_hashes": [
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"99927561585526914514058670764641269594",
"3772378418612330565640726444931235628"
],
"threshold": 0.9
}
},
{
"id": "CVE-2022-49640-4f8a3fee",
"signature_type": "Line",
"signature_version": "v1",
"target": {
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@40e0477a7371d101c55b69d9c32a7a1ed82ab5ea",
"deprecated": false,
"digest": {
"line_hashes": [
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"242856724098149974409336473532074597943",
"99927561585526914514058670764641269594",
"3772378418612330565640726444931235628"
],
"threshold": 0.9
}
},
{
"id": "CVE-2022-49640-6a5bdce3",
"signature_type": "Line",
"signature_version": "v1",
"target": {
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3a2144b3b6bf9ecafd91087c8b8b48171ec19df",
"deprecated": false,
"digest": {
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"99927561585526914514058670764641269594",
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],
"threshold": 0.9
}
},
{
"id": "CVE-2022-49640-7b73680e",
"signature_type": "Function",
"signature_version": "v1",
"target": {
"function": "do_proc_douintvec_minmax_conv",
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@40e0477a7371d101c55b69d9c32a7a1ed82ab5ea",
"deprecated": false,
"digest": {
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"function_hash": "145152170518865989254362898586485218502"
}
},
{
"id": "CVE-2022-49640-922eddab",
"signature_type": "Line",
"signature_version": "v1",
"target": {
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2d3b559df3ed39258737789aae2ae7973d205bc1",
"deprecated": false,
"digest": {
"line_hashes": [
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"242856724098149974409336473532074597943",
"99927561585526914514058670764641269594",
"3772378418612330565640726444931235628"
],
"threshold": 0.9
}
},
{
"id": "CVE-2022-49640-c0f416df",
"signature_type": "Function",
"signature_version": "v1",
"target": {
"function": "do_proc_douintvec_minmax_conv",
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e3a2144b3b6bf9ecafd91087c8b8b48171ec19df",
"deprecated": false,
"digest": {
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"function_hash": "145152170518865989254362898586485218502"
}
},
{
"id": "CVE-2022-49640-d738d8b5",
"signature_type": "Function",
"signature_version": "v1",
"target": {
"function": "do_proc_douintvec_minmax_conv",
"file": "kernel/sysctl.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2d3b559df3ed39258737789aae2ae7973d205bc1",
"deprecated": false,
"digest": {
"length": 428.0,
"function_hash": "145152170518865989254362898586485218502"
}
}
]