CVE-2024-46794
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-46794
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46794.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-46794
- Downstream
- Related
- Published
- 2024-09-18T07:12:49Z
- Modified
- 2025-10-17T12:29:58.045265Z
- Summary
- x86/tdx: Fix data leak in mmio_read()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
x86/tdx: Fix data leak in mmio_read()
The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM.
Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM.
This variable is only needed as an output value. It did not need to be passed to the VMM in the first place.
Do not send the original value of *val to the VMM.
[ dhansen: clarify what 'val' is used for. ]
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7
- https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa
- https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661
- https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7
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
-
Introduced31d58c4e557d46fa7f8557714250fb6f89c941aeFixed26c6af49d26ffc377e392e30d4086db19eed0ef7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced31d58c4e557d46fa7f8557714250fb6f89c941aeFixedef00818c50cf55a3a56bd9a9fae867c92dfb84e7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced31d58c4e557d46fa7f8557714250fb6f89c941aeFixedb55ce742afcb8e8189d82f2f1e635ba1b5a461fa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced31d58c4e557d46fa7f8557714250fb6f89c941aeFixedb6fb565a2d15277896583d471b21bc14a0c99661
Affected versions
v5.*
v5.18
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
v6.2
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
[
{
"deprecated": false,
"id": "CVE-2024-46794-10db7a6b",
"signature_version": "v1",
"target": {
"function": "mmio_read",
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"length": 335.0,
"function_hash": "54463444951211368130729671755142357955"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b55ce742afcb8e8189d82f2f1e635ba1b5a461fa",
"signature_type": "Function"
},
{
"deprecated": false,
"id": "CVE-2024-46794-4670725e",
"signature_version": "v1",
"target": {
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"101696689490902000001513527168559207449",
"123492621496131816570662921087458499318",
"157959169044268421338970007069837022545",
"269671921466016615720730552004379991678"
]
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@26c6af49d26ffc377e392e30d4086db19eed0ef7",
"signature_type": "Line"
},
{
"deprecated": false,
"id": "CVE-2024-46794-5a794a01",
"signature_version": "v1",
"target": {
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"101696689490902000001513527168559207449",
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"35991068781066618736201148758295893014",
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]
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b6fb565a2d15277896583d471b21bc14a0c99661",
"signature_type": "Line"
},
{
"deprecated": false,
"id": "CVE-2024-46794-5fd4d87a",
"signature_version": "v1",
"target": {
"function": "mmio_read",
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"length": 335.0,
"function_hash": "54463444951211368130729671755142357955"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b6fb565a2d15277896583d471b21bc14a0c99661",
"signature_type": "Function"
},
{
"deprecated": false,
"id": "CVE-2024-46794-78e931a7",
"signature_version": "v1",
"target": {
"function": "mmio_read",
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"length": 358.0,
"function_hash": "196941188969675234864410861503613168977"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@26c6af49d26ffc377e392e30d4086db19eed0ef7",
"signature_type": "Function"
},
{
"deprecated": false,
"id": "CVE-2024-46794-7efa15c0",
"signature_version": "v1",
"target": {
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
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"line_hashes": [
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]
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b55ce742afcb8e8189d82f2f1e635ba1b5a461fa",
"signature_type": "Line"
},
{
"deprecated": false,
"id": "CVE-2024-46794-af00a20a",
"signature_version": "v1",
"target": {
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
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},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ef00818c50cf55a3a56bd9a9fae867c92dfb84e7",
"signature_type": "Line"
},
{
"deprecated": false,
"id": "CVE-2024-46794-ba2d3973",
"signature_version": "v1",
"target": {
"function": "mmio_read",
"file": "arch/x86/coco/tdx/tdx.c"
},
"digest": {
"length": 335.0,
"function_hash": "54463444951211368130729671755142357955"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ef00818c50cf55a3a56bd9a9fae867c92dfb84e7",
"signature_type": "Function"
}
]