CVE-2022-49958

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49958
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49958.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49958
Downstream
Related
Published
2025-06-18T11:00:20Z
Modified
2025-10-13T23:27:41.245360Z
Summary
net/sched: fix netdevice reference leaks in attach_default_qdiscs()
Details

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

net/sched: fix netdevice reference leaks in attachdefaultqdiscs()

In attachdefaultqdiscs(), if a dev has multiple queues and queue 0 fails to attach qdisc because there is no memory in attachonedefaultqdisc(). Then dev->qdisc will be noopqdisc by default. But the other queues may be able to successfully attach to default qdisc.

In this case, the fallback to noqueue process will be triggered. If the original attached qdisc is not released and a new one is directly attached, this will cause netdevice reference leaks.

The following is the bug log:

veth0: default qdisc (fqcodel) fail, fallback to noqueue unregisternetdevice: waiting for veth0 to become free. Usage count = 32 leaked reference. qdiscalloc+0x12e/0x210 qdisccreatedflt+0x62/0x140 attachonedefaultqdisc.constprop.41+0x44/0x70 devactivate+0x128/0x290 devopen+0x12a/0x190 _devchangeflags+0x1a2/0x1f0 devchangeflags+0x23/0x60 dosetlink+0x332/0x1150 _rtnlnewlink+0x52f/0x8e0 rtnlnewlink+0x43/0x70 rtnetlinkrcvmsg+0x140/0x3b0 netlinkrcvskb+0x50/0x100 netlinkunicast+0x1bb/0x290 netlinksendmsg+0x37c/0x4e0 socksendmsg+0x5f/0x70 sys_sendmsg+0x208/0x280

Fix this bug by clearing any non-noop qdiscs that may have been assigned before trying to re-attach.

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
bf6dba76d278d296b385b436d3ac7de56c190d44
Fixed
44dfa645895a56f65461249deb5b81cd16560e2a
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bf6dba76d278d296b385b436d3ac7de56c190d44
Fixed
a420d587260185407eda9c5766cfa9bdd5c39a56
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bf6dba76d278d296b385b436d3ac7de56c190d44
Fixed
0c6c522857151ac00150fd01baeebf231fb7d142
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bf6dba76d278d296b385b436d3ac7de56c190d44
Fixed
f612466ebecb12a00d9152344ddda6f6345f04dc

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
v5.10.120
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
v5.10.15
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
v5.15.56
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
v5.15.7
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
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v5.19.1
v5.19.2
v5.19.3
v5.19.4
v5.19.5
v5.19.6
v5.19.7
v5.7
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-rc1
v6.0-rc2

Database specific 

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c"
            },
            "signature_type": "Line",
            "id": "CVE-2022-49958-04b21cbc",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@44dfa645895a56f65461249deb5b81cd16560e2a",
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "20607764225058561318123018392656833762",
                    "257564723634608891535525506617107756182",
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                    "231617028464106697275778555302457850454",
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                    "175427873534555616732010998929469613881",
                    "75696672475976888679954452720668840842",
                    "112523961341462213960418863555731990488",
                    "205122395202244977978635189431303158303",
                    "282371188964726004011815114850631399713",
                    "308752814867962719931883369994246764743",
                    "174632328267721911267244410244235009665",
                    "93502983068481219327648134590545161935",
                    "129519151024504636813798672505299841848",
                    "274060855203254467083889959691181203342"
                ]
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c",
                "function": "attach_default_qdiscs"
            },
            "signature_type": "Function",
            "id": "CVE-2022-49958-13b9c0e5",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0c6c522857151ac00150fd01baeebf231fb7d142",
            "digest": {
                "length": 944.0,
                "function_hash": "15742720197113111330474008562728589317"
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c"
            },
            "signature_type": "Line",
            "id": "CVE-2022-49958-1ae35c55",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0c6c522857151ac00150fd01baeebf231fb7d142",
            "digest": {
                "threshold": 0.9,
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                    "75696672475976888679954452720668840842",
                    "112523961341462213960418863555731990488",
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                    "174632328267721911267244410244235009665",
                    "93502983068481219327648134590545161935",
                    "129519151024504636813798672505299841848",
                    "274060855203254467083889959691181203342"
                ]
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c",
                "function": "attach_default_qdiscs"
            },
            "signature_type": "Function",
            "id": "CVE-2022-49958-20929e0c",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a420d587260185407eda9c5766cfa9bdd5c39a56",
            "digest": {
                "length": 944.0,
                "function_hash": "15742720197113111330474008562728589317"
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c",
                "function": "attach_default_qdiscs"
            },
            "signature_type": "Function",
            "id": "CVE-2022-49958-2e80a07e",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@44dfa645895a56f65461249deb5b81cd16560e2a",
            "digest": {
                "length": 944.0,
                "function_hash": "15742720197113111330474008562728589317"
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c",
                "function": "attach_default_qdiscs"
            },
            "signature_type": "Function",
            "id": "CVE-2022-49958-4a32db50",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f612466ebecb12a00d9152344ddda6f6345f04dc",
            "digest": {
                "length": 944.0,
                "function_hash": "15742720197113111330474008562728589317"
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c"
            },
            "signature_type": "Line",
            "id": "CVE-2022-49958-e66a3896",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f612466ebecb12a00d9152344ddda6f6345f04dc",
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
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                    "2526906953233454592124553410287561734",
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                    "112523961341462213960418863555731990488",
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                    "93502983068481219327648134590545161935",
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                ]
            },
            "deprecated": false
        },
        {
            "signature_version": "v1",
            "target": {
                "file": "net/sched/sch_generic.c"
            },
            "signature_type": "Line",
            "id": "CVE-2022-49958-f3e4b843",
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a420d587260185407eda9c5766cfa9bdd5c39a56",
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "20607764225058561318123018392656833762",
                    "257564723634608891535525506617107756182",
                    "2526906953233454592124553410287561734",
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                    "231617028464106697275778555302457850454",
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                    "223779465584259944527934179295521391525",
                    "175427873534555616732010998929469613881",
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                    "93502983068481219327648134590545161935",
                    "129519151024504636813798672505299841848",
                    "274060855203254467083889959691181203342"
                ]
            },
            "deprecated": false
        }
    ]
}

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.8.0
Fixed
5.10.142
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.66
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.19.8