CVE-2023-52659

Source
https://nvd.nist.gov/vuln/detail/CVE-2023-52659
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52659.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-52659
Downstream
Related
Published
2024-05-17T12:08:36Z
Modified
2025-10-21T14:37:25.363986Z
Summary
x86/mm: Ensure input to pfn_to_kaddr() is treated as a 64-bit type
Details

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

x86/mm: Ensure input to pfntokaddr() is treated as a 64-bit type

On 64-bit platforms, the pfntokaddr() macro requires that the input value is 64 bits in order to ensure that valid address bits don't get lost when shifting that input by PAGE_SHIFT to calculate the physical address to provide a virtual address for.

One such example is in pvalidatepages() (used by SEV-SNP guests), where the GFN in the struct used for page-state change requests is a 40-bit bit-field, so attempts to pass this GFN field directly into pfnto_kaddr() ends up causing guest crashes when dealing with addresses above the 1TB range due to the above.

Fix this issue with SEV-SNP guests, as well as any similar cases that might cause issues in current/future code, by using an inline function, instead of a macro, so that the input is implicitly cast to the expected 64-bit input type prior to performing the shift operation.

While it might be argued that the issue is on the caller side, other archs/macros have taken similar approaches to deal with instances like this, such as ARM explicitly casting the input to physaddrt:

e48866647b48 ("ARM: 8396/1: use physaddrt in pfntokaddr()")

A C inline function is even better though.

[ mingo: Refined the changelog some more & added _alwaysinline. ]

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
6c3211796326a9d35618b866826ca556c8f008a8
Fixed
325956b0173f11e98f90462be4829a8b8b0682ce
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c3211796326a9d35618b866826ca556c8f008a8
Fixed
7e1471888a5e6e846e9b4d306e5327db2b58e64e
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c3211796326a9d35618b866826ca556c8f008a8
Fixed
814305b5c23cb815ada68d43019f39050472b25f
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c3211796326a9d35618b866826ca556c8f008a8
Fixed
8e5647a723c49d73b9f108a8bb38e8c29d3948ea

Affected versions

v6.*

v6.4
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
v6.6.3
v6.6.4
v6.6.5
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
v6.7.1
v6.7.10
v6.7.2
v6.7.3
v6.7.4
v6.7.5
v6.7.6
v6.7.7
v6.7.8
v6.7.9
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.8.1

Database specific

vanir_signatures

[
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@814305b5c23cb815ada68d43019f39050472b25f",
        "target": {
            "file": "arch/x86/include/asm/page.h"
        },
        "deprecated": false,
        "id": "CVE-2023-52659-38f5d666",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "59985941995915257408870132178654290450",
                "57273407679775980394435400285111972143",
                "231886507218390425545501352867019768984",
                "114529852027247912527269873937600587229"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@325956b0173f11e98f90462be4829a8b8b0682ce",
        "target": {
            "file": "arch/x86/include/asm/page.h"
        },
        "deprecated": false,
        "id": "CVE-2023-52659-7ea21088",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "59985941995915257408870132178654290450",
                "57273407679775980394435400285111972143",
                "231886507218390425545501352867019768984",
                "114529852027247912527269873937600587229"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@8e5647a723c49d73b9f108a8bb38e8c29d3948ea",
        "target": {
            "file": "arch/x86/include/asm/page.h"
        },
        "deprecated": false,
        "id": "CVE-2023-52659-81aa387e",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "59985941995915257408870132178654290450",
                "57273407679775980394435400285111972143",
                "231886507218390425545501352867019768984",
                "114529852027247912527269873937600587229"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7e1471888a5e6e846e9b4d306e5327db2b58e64e",
        "target": {
            "file": "arch/x86/include/asm/page.h"
        },
        "deprecated": false,
        "id": "CVE-2023-52659-aa9d0911",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "59985941995915257408870132178654290450",
                "57273407679775980394435400285111972143",
                "231886507218390425545501352867019768984",
                "114529852027247912527269873937600587229"
            ]
        },
        "signature_type": "Line"
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.5.0
Fixed
6.6.23
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.7.11
Type
ECOSYSTEM
Events
Introduced
6.8.0
Fixed
6.8.2