CVE-2022-49873
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49873
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49873.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49873
- Downstream
- Published
- 2025-05-01T14:10:23Z
- Modified
- 2025-10-15T00:58:24.223671Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- bpf: Fix wrong reg type conversion in release_reference()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix wrong reg type conversion in release_reference()
Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release these memories by calling the corresponding helper functions.
When a resource is released, all pointer registers corresponding to the resource should be invalidated. The verifier use releasereferences() to do this job, by apply _markregunknown() to each relevant register.
It will give these registers the type of SCALARVALUE. A register that will contain a pointer value at runtime, but of type SCALARVALUE, which may allow the unprivileged user to get a kernel pointer by storing this register into a map.
Using _markregnotinit() while NOT allowptrleaks can mitigate this problem.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240
- https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5
- https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037
- https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b
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
-
Introducedfd978bf7fd312581a7ca454a991f0ffb34c4204bFixedcedd4f01f67be94735f15123158f485028571037
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd978bf7fd312581a7ca454a991f0ffb34c4204bFixed466ce46f251dfb259a8cbaa895ab9edd6fb56240
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd978bf7fd312581a7ca454a991f0ffb34c4204bFixedae5ccad6c711db0f2ca1231be051935dd128b8f5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd978bf7fd312581a7ca454a991f0ffb34c4204bFixedf1db20814af532f85e091231223e5e4818e8464b
Affected versions
v4.*
v4.19
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
v5.10.132
v5.10.133
v5.10.134
v5.10.135
v5.10.136
v5.10.137
v5.10.138
v5.10.139
v5.10.14
v5.10.140
v5.10.141
v5.10.142
v5.10.143
v5.10.144
v5.10.145
v5.10.146
v5.10.147
v5.10.148
v5.10.149
v5.10.15
v5.10.150
v5.10.151
v5.10.152
v5.10.153
v5.10.154
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
v5.15.56
v5.15.57
v5.15.58
v5.15.59
v5.15.6
v5.15.60
v5.15.61
v5.15.62
v5.15.63
v5.15.64
v5.15.65
v5.15.66
v5.15.67
v5.15.68
v5.15.69
v5.15.7
v5.15.70
v5.15.71
v5.15.72
v5.15.73
v5.15.74
v5.15.75
v5.15.76
v5.15.77
v5.15.78
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
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
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
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.0.1
v6.0.2
v6.0.3
v6.0.4
v6.0.5
v6.0.6
v6.0.7
v6.0.8
v6.1-rc1
v6.1-rc2
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "kernel/bpf/verifier.c",
"function": "release_reference"
},
"deprecated": false,
"digest": {
"length": 310.0,
"function_hash": "86970995712284073911234276435896911262"
},
"id": "CVE-2022-49873-22cc2dcb",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ae5ccad6c711db0f2ca1231be051935dd128b8f5"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "kernel/bpf/verifier.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"58602515168108372695441352858311197430",
"329079171812386360491761994686936596223",
"6762055477635818335044629353497163876",
"328077743567977203175428156740805248714",
"137721301392252032070799853269334686346"
],
"threshold": 0.9
},
"id": "CVE-2022-49873-4299e293",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f1db20814af532f85e091231223e5e4818e8464b"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "kernel/bpf/verifier.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"58602515168108372695441352858311197430",
"329079171812386360491761994686936596223",
"6762055477635818335044629353497163876",
"328077743567977203175428156740805248714",
"137721301392252032070799853269334686346"
],
"threshold": 0.9
},
"id": "CVE-2022-49873-61213c6e",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cedd4f01f67be94735f15123158f485028571037"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "kernel/bpf/verifier.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"58602515168108372695441352858311197430",
"329079171812386360491761994686936596223",
"6762055477635818335044629353497163876",
"328077743567977203175428156740805248714",
"137721301392252032070799853269334686346"
],
"threshold": 0.9
},
"id": "CVE-2022-49873-868e9f4d",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@466ce46f251dfb259a8cbaa895ab9edd6fb56240"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "kernel/bpf/verifier.c",
"function": "release_reference"
},
"deprecated": false,
"digest": {
"length": 310.0,
"function_hash": "86970995712284073911234276435896911262"
},
"id": "CVE-2022-49873-8eacb055",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@cedd4f01f67be94735f15123158f485028571037"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "kernel/bpf/verifier.c",
"function": "release_reference"
},
"deprecated": false,
"digest": {
"length": 310.0,
"function_hash": "86970995712284073911234276435896911262"
},
"id": "CVE-2022-49873-99e5af3e",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@466ce46f251dfb259a8cbaa895ab9edd6fb56240"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "kernel/bpf/verifier.c",
"function": "release_reference"
},
"deprecated": false,
"digest": {
"length": 310.0,
"function_hash": "86970995712284073911234276435896911262"
},
"id": "CVE-2022-49873-ca33553f",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f1db20814af532f85e091231223e5e4818e8464b"
},
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "kernel/bpf/verifier.c"
},
"deprecated": false,
"digest": {
"line_hashes": [
"58602515168108372695441352858311197430",
"329079171812386360491761994686936596223",
"6762055477635818335044629353497163876",
"328077743567977203175428156740805248714",
"137721301392252032070799853269334686346"
],
"threshold": 0.9
},
"id": "CVE-2022-49873-cdebc8e4",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ae5ccad6c711db0f2ca1231be051935dd128b8f5"
}
]
}