CVE-2024-46795
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-46795
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46795.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-46795
- Downstream
- Related
- Published
- 2024-09-18T07:12:50Z
- Modified
- 2025-10-14T23:41:12.235416Z
- Summary
- ksmbd: unset the binding mark of a reused connection
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: unset the binding mark of a reused connection
Steve French reported null pointer dereference error from sha256 lib. cifs.ko can send session setup requests on reused connection. If reused connection is used for binding session, conn->binding can still remain true and generatepreauthhash() will not set sess->PreauthHashValue and it will be NULL. It is used as a material to create an encryption key in ksmbdgensmb311encryptionkey. ->PreauthHashValue cause null pointer dereference error from cryptoshash_update().
BUG: kernel NULL pointer dereference, address: 0000000000000000
PF: supervisor read access in kernel mode
PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 8 PID: 429254 Comm: kworker/8:39 Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET69W (1.52 ) Workqueue: ksmbd-io handleksmbdwork [ksmbd] RIP: 0010:libsha256basedoupdate.isra.0+0x11e/0x1d0 [sha256ssse3] <TASK> ? showregs+0x6d/0x80 ? _die+0x24/0x80 ? pagefaultoops+0x99/0x1b0 ? douseraddrfault+0x2ee/0x6b0 ? excpagefault+0x83/0x1b0 ? asmexcpagefault+0x27/0x30 ? _pfxsha256transformrorx+0x10/0x10 [sha256ssse3] ? libsha256basedoupdate.isra.0+0x11e/0x1d0 [sha256ssse3] ? _pfxsha256transformrorx+0x10/0x10 [sha256ssse3] ? _pfxsha256transformrorx+0x10/0x10 [sha256ssse3] _sha256update+0x77/0xa0 [sha256ssse3] sha256avx2update+0x15/0x30 [sha256ssse3] cryptoshashupdate+0x1e/0x40 hmacupdate+0x12/0x20 cryptoshashupdate+0x1e/0x40 generatekey+0x234/0x380 [ksmbd] generatesmb3encryptionkey+0x40/0x1c0 [ksmbd] ksmbdgensmb311encryptionkey+0x72/0xa0 [ksmbd] ntlmauthenticate.isra.0+0x423/0x5d0 [ksmbd] smb2sesssetup+0x952/0xaa0 [ksmbd] _processrequest+0xa3/0x1d0 [ksmbd] _handleksmbdwork+0x1c4/0x2f0 [ksmbd] handleksmbdwork+0x2d/0xa0 [ksmbd] processonework+0x16c/0x350 workerthread+0x306/0x440 ? _pfxworkerthread+0x10/0x10 kthread+0xef/0x120 ? _pfxkthread+0x10/0x10 retfromfork+0x44/0x70 ? _pfxkthread+0x10/0x10 retfromfork_asm+0x1b/0x30 </TASK>
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9cce
- https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1
- https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5
- https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02
- https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1
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
-
Introducedf5a544e3bab78142207e0242d22442db85ba1effFixed9914f1bd61d5e838bb1ab15a71076d37a6db65d1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf5a544e3bab78142207e0242d22442db85ba1effFixed93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf5a544e3bab78142207e0242d22442db85ba1effFixed41bc256da7e47b679df87c7fc7a5b393052b9cce
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf5a544e3bab78142207e0242d22442db85ba1effFixed4c8496f44f5bb5c06cdef5eb130ab259643392a1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf5a544e3bab78142207e0242d22442db85ba1effFixed78c5a6f1f630172b19af4912e755e1da93ef0ab5
Affected versions
v5.*
v5.13
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
v5.15.100
v5.15.101
v5.15.102
v5.15.103
v5.15.104
v5.15.105
v5.15.106
v5.15.107
v5.15.108
v5.15.109
v5.15.11
v5.15.110
v5.15.111
v5.15.112
v5.15.113
v5.15.114
v5.15.115
v5.15.116
v5.15.117
v5.15.118
v5.15.119
v5.15.12
v5.15.120
v5.15.121
v5.15.122
v5.15.123
v5.15.124
v5.15.125
v5.15.126
v5.15.127
v5.15.128
v5.15.129
v5.15.13
v5.15.130
v5.15.131
v5.15.132
v5.15.133
v5.15.134
v5.15.135
v5.15.136
v5.15.137
v5.15.138
v5.15.139
v5.15.14
v5.15.140
v5.15.141
v5.15.142
v5.15.143
v5.15.144
v5.15.145
v5.15.146
v5.15.147
v5.15.148
v5.15.149
v5.15.15
v5.15.150
v5.15.151
v5.15.152
v5.15.153
v5.15.154
v5.15.155
v5.15.156
v5.15.157
v5.15.158
v5.15.159
v5.15.16
v5.15.160
v5.15.161
v5.15.162
v5.15.163
v5.15.164
v5.15.165
v5.15.166
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
v5.15.79
v5.15.8
v5.15.80
v5.15.81
v5.15.82
v5.15.83
v5.15.84
v5.15.85
v5.15.86
v5.15.87
v5.15.88
v5.15.89
v5.15.9
v5.15.90
v5.15.91
v5.15.92
v5.15.93
v5.15.94
v5.15.95
v5.15.96
v5.15.97
v5.15.98
v5.15.99
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
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.10
v6.1.100
v6.1.101
v6.1.102
v6.1.103
v6.1.104
v6.1.105
v6.1.106
v6.1.107
v6.1.108
v6.1.109
v6.1.11
v6.1.12
v6.1.13
v6.1.14
v6.1.15
v6.1.16
v6.1.17
v6.1.18
v6.1.19
v6.1.2
v6.1.20
v6.1.21
v6.1.22
v6.1.23
v6.1.24
v6.1.25
v6.1.26
v6.1.27
v6.1.28
v6.1.29
v6.1.3
v6.1.30
v6.1.31
v6.1.32
v6.1.33
v6.1.34
v6.1.35
v6.1.36
v6.1.37
v6.1.38
v6.1.39
v6.1.4
v6.1.40
v6.1.41
v6.1.42
v6.1.43
v6.1.44
v6.1.45
v6.1.46
v6.1.47
v6.1.48
v6.1.49
v6.1.5
v6.1.50
v6.1.51
v6.1.52
v6.1.53
v6.1.54
v6.1.55
v6.1.56
v6.1.57
v6.1.58
v6.1.59
v6.1.6
v6.1.60
v6.1.61
v6.1.62
v6.1.63
v6.1.64
v6.1.65
v6.1.66
v6.1.67
v6.1.68
v6.1.69
v6.1.7
v6.1.70
v6.1.71
v6.1.72
v6.1.73
v6.1.74
v6.1.75
v6.1.76
v6.1.77
v6.1.78
v6.1.79
v6.1.8
v6.1.80
v6.1.81
v6.1.82
v6.1.83
v6.1.84
v6.1.85
v6.1.86
v6.1.87
v6.1.88
v6.1.89
v6.1.9
v6.1.90
v6.1.91
v6.1.92
v6.1.93
v6.1.94
v6.1.95
v6.1.96
v6.1.97
v6.1.98
v6.1.99
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.10.1
v6.10.2
v6.10.3
v6.10.4
v6.10.5
v6.10.6
v6.10.7
v6.10.8
v6.10.9
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.2
v6.6.20
v6.6.21
v6.6.22
v6.6.23
v6.6.24
v6.6.25
v6.6.26
v6.6.27
v6.6.28
v6.6.29
v6.6.3
v6.6.30
v6.6.31
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.4
v6.6.40
v6.6.41
v6.6.42
v6.6.43
v6.6.44
v6.6.45
v6.6.46
v6.6.47
v6.6.48
v6.6.49
v6.6.5
v6.6.50
v6.6.6
v6.6.7
v6.6.8
v6.6.9
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7
Database specific
{
"vanir_signatures": [
{
"signature_type": "Line",
"target": {
"file": "fs/smb/server/smb2pdu.c"
},
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"34192052524658546439786353715138847164",
"72546139419034437292296048425472462484",
"267920009483677326250844541626722031491",
"249788002433584359926619934667966931254",
"56437587250413414547007411280714475162",
"69247267736936506971212634569490977069",
"153732854993840620820998404706163666126",
"209743323086938786955582537276568982192"
]
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@41bc256da7e47b679df87c7fc7a5b393052b9cce",
"id": "CVE-2024-46795-239b3d16"
},
{
"signature_type": "Function",
"target": {
"file": "fs/smb/server/smb2pdu.c",
"function": "smb2_sess_setup"
},
"signature_version": "v1",
"digest": {
"length": 5245.0,
"function_hash": "21262929615224412673880583901800798200"
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02",
"id": "CVE-2024-46795-2c77fc32"
},
{
"signature_type": "Function",
"target": {
"file": "fs/smb/server/smb2pdu.c",
"function": "smb2_sess_setup"
},
"signature_version": "v1",
"digest": {
"length": 5245.0,
"function_hash": "21262929615224412673880583901800798200"
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@41bc256da7e47b679df87c7fc7a5b393052b9cce",
"id": "CVE-2024-46795-3ea14c23"
},
{
"signature_type": "Function",
"target": {
"file": "fs/ksmbd/smb2pdu.c",
"function": "smb2_sess_setup"
},
"signature_version": "v1",
"digest": {
"length": 5245.0,
"function_hash": "21262929615224412673880583901800798200"
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9914f1bd61d5e838bb1ab15a71076d37a6db65d1",
"id": "CVE-2024-46795-4821385b"
},
{
"signature_type": "Function",
"target": {
"file": "fs/smb/server/smb2pdu.c",
"function": "smb2_sess_setup"
},
"signature_version": "v1",
"digest": {
"length": 5245.0,
"function_hash": "21262929615224412673880583901800798200"
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@78c5a6f1f630172b19af4912e755e1da93ef0ab5",
"id": "CVE-2024-46795-8bab762a"
},
{
"signature_type": "Line",
"target": {
"file": "fs/smb/server/smb2pdu.c"
},
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"34192052524658546439786353715138847164",
"72546139419034437292296048425472462484",
"267920009483677326250844541626722031491",
"249788002433584359926619934667966931254",
"56437587250413414547007411280714475162",
"69247267736936506971212634569490977069",
"153732854993840620820998404706163666126",
"209743323086938786955582537276568982192"
]
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@78c5a6f1f630172b19af4912e755e1da93ef0ab5",
"id": "CVE-2024-46795-ae6e8d0b"
},
{
"signature_type": "Function",
"target": {
"file": "fs/smb/server/smb2pdu.c",
"function": "smb2_sess_setup"
},
"signature_version": "v1",
"digest": {
"length": 5245.0,
"function_hash": "21262929615224412673880583901800798200"
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@4c8496f44f5bb5c06cdef5eb130ab259643392a1",
"id": "CVE-2024-46795-b7db9450"
},
{
"signature_type": "Line",
"target": {
"file": "fs/ksmbd/smb2pdu.c"
},
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"34192052524658546439786353715138847164",
"72546139419034437292296048425472462484",
"267920009483677326250844541626722031491",
"249788002433584359926619934667966931254",
"56437587250413414547007411280714475162",
"69247267736936506971212634569490977069",
"153732854993840620820998404706163666126",
"209743323086938786955582537276568982192"
]
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9914f1bd61d5e838bb1ab15a71076d37a6db65d1",
"id": "CVE-2024-46795-c203b2ca"
},
{
"signature_type": "Line",
"target": {
"file": "fs/smb/server/smb2pdu.c"
},
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"34192052524658546439786353715138847164",
"72546139419034437292296048425472462484",
"267920009483677326250844541626722031491",
"249788002433584359926619934667966931254",
"56437587250413414547007411280714475162",
"69247267736936506971212634569490977069",
"153732854993840620820998404706163666126",
"209743323086938786955582537276568982192"
]
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@4c8496f44f5bb5c06cdef5eb130ab259643392a1",
"id": "CVE-2024-46795-c3b6e24e"
},
{
"signature_type": "Line",
"target": {
"file": "fs/smb/server/smb2pdu.c"
},
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"34192052524658546439786353715138847164",
"72546139419034437292296048425472462484",
"267920009483677326250844541626722031491",
"249788002433584359926619934667966931254",
"56437587250413414547007411280714475162",
"69247267736936506971212634569490977069",
"153732854993840620820998404706163666126",
"209743323086938786955582537276568982192"
]
},
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02",
"id": "CVE-2024-46795-e7d77023"
}
]
}