CVE-2022-49698
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49698
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49698.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49698
- Downstream
- Published
- 2025-02-26T02:24:19Z
- Modified
- 2025-10-21T11:12:27.340462Z
- Summary
- netfilter: use get_random_u32 instead of prandom
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: use getrandomu32 instead of prandom
bh might occur while updating per-cpu rndstate from user context, ie. localout path.
BUG: using smpprocessorid() in preemptible [00000000] code: nginx/2725 caller is nftngrandomeval+0x24/0x54 [nftnumgen] Call Trace: checkpreemptiondisabled+0xde/0xe0 nftngrandomeval+0x24/0x54 [nftnumgen]
Use the random driver instead, this also avoids need for local prandom state. Moreover, prandom now uses the random driver since d4150779e60f ("random32: use real rng for non-deterministic randomness").
Based on earlier patch from Pablo Neira.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
- https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852
- https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba
- https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c
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
-
Introduced978d8f9055c3a7c35db2ac99cd2580b993396e33Fixed15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced978d8f9055c3a7c35db2ac99cd2580b993396e33Fixedd0906b0fffc9f19bc42708ca3e84e2089088386c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced978d8f9055c3a7c35db2ac99cd2580b993396e33Fixed6ce71f83f798be7e1ca68707fec449fbecb38852
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced978d8f9055c3a7c35db2ac99cd2580b993396e33Fixedb1fd94e704571f98b21027340eecf821b2bdffba
Affected versions
v4.*
v4.17
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
v5.10.13
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
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
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
v5.18.2
v5.18.3
v5.18.4
v5.18.5
v5.18.6
v5.18.7
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
[
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b1fd94e704571f98b21027340eecf821b2bdffba",
"target": {
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-0560151e",
"deprecated": false,
"signature_type": "Line",
"digest": {
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],
"threshold": 0.9
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d0906b0fffc9f19bc42708ca3e84e2089088386c",
"target": {
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},
"id": "CVE-2022-49698-0c715b80",
"deprecated": false,
"signature_type": "Line",
"digest": {
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},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b",
"target": {
"function": "nft_ng_random_gen",
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-169ffbac",
"deprecated": false,
"signature_type": "Function",
"digest": {
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"length": 175.0
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d0906b0fffc9f19bc42708ca3e84e2089088386c",
"target": {
"function": "nft_ng_random_gen",
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-2f161174",
"deprecated": false,
"signature_type": "Function",
"digest": {
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},
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},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b",
"target": {
"function": "nft_prandom_u32",
"file": "net/netfilter/nft_meta.c"
},
"id": "CVE-2022-49698-442ed3e4",
"deprecated": false,
"signature_type": "Function",
"digest": {
"function_hash": "186190636015094381600536381631653814975",
"length": 110.0
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@6ce71f83f798be7e1ca68707fec449fbecb38852",
"target": {
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-5a1d98b9",
"deprecated": false,
"signature_type": "Line",
"digest": {
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],
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},
"signature_version": "v1"
},
{
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"target": {
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-5ca3ac02",
"deprecated": false,
"signature_type": "Line",
"digest": {
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],
"threshold": 0.9
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b1fd94e704571f98b21027340eecf821b2bdffba",
"target": {
"file": "net/netfilter/nft_meta.c"
},
"id": "CVE-2022-49698-651b8b0e",
"deprecated": false,
"signature_type": "Line",
"digest": {
"line_hashes": [
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],
"threshold": 0.9
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b1fd94e704571f98b21027340eecf821b2bdffba",
"target": {
"function": "nft_prandom_u32",
"file": "net/netfilter/nft_meta.c"
},
"id": "CVE-2022-49698-93bdeb52",
"deprecated": false,
"signature_type": "Function",
"digest": {
"function_hash": "186190636015094381600536381631653814975",
"length": 110.0
},
"signature_version": "v1"
},
{
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b1fd94e704571f98b21027340eecf821b2bdffba",
"target": {
"function": "nft_ng_random_gen",
"file": "net/netfilter/nft_numgen.c"
},
"id": "CVE-2022-49698-9e37baf4",
"deprecated": false,
"signature_type": "Function",
"digest": {
"function_hash": "128437127526539898919847019517354171233",
"length": 175.0
},
"signature_version": "v1"
},
{
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