NVD

CVE-2023-52481 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add Cortex-A520 speculative unprivileged load workaround Implement the workaround for ARM Cortex-A520 erratum 2966298. On an affected Cortex-A520 core, a speculatively executed unprivileged load might leak data from a privileged load via a cache side channel. The issue only exists for loads within a translation regime with the same translation (e.g. same ASID and VMID). Therefore, the issue only affects the return to EL0. The workaround is to execute a TLBI before returning to EL0 after all loads of privileged data. A non-shareable TLBI to any address is sufficient. The workaround isn't necessary if page table isolation (KPTI) is enabled, but for simplicity it will be. Page table isolation should normally be disabled for Cortex-A520 as it supports the CSV3 feature and the E0PD feature (used when KASLR is enabled).

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

ADP: CISA-ADP

Base Score: 4.7 MEDIUM

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c	CVE, kernel.org	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

CVE Modified by kernel.org 8/15/2026 9:17:44 AM

Action

Type

Old Value

New Value

Changed

Affected

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c","versionType":"git","status":"affected"},{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"32b0a4ffcaea44a00a61e40c0d1bcc50362aee25","versionType":"git","status":"affected"},{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"471470bc7052d28ce125901877dd10e4c048e513","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","versionType":"semver","status":"unaffected"},{"version":"6.1.57","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.5.7","lessThanOrEqual":"6.5.*","versionType":"semver","status":"unaffected"},{"version":"6.6","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"60ffc30d5652810dd34ea2eec41504222f5d5791","lessThan":"6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c","versionType":"git","status":"affected"},{"version":"60ffc30d5652810dd34ea2eec41504222f5d5791","lessThan":"32b0a4ffcaea44a00a61e40c0d1bcc50362aee25","versionType":"git","status":"affected"},{"version":"60ffc30d5652810dd34ea2eec41504222f5d5791","lessThan":"471470bc7052d28ce125901877dd10e4c048e513","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","versionType":"semver","status":"unaffected"},{"version":"6.1.57","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.5.7","lessThanOrEqual":"6.5.*","versionType":"semver","status":"unaffected"},{"version":"6.6","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

CVE Modified by kernel.org 6/17/2026 2:42:49 AM

Action

Type

Old Value

New Value

Added

Affected

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c","versionType":"git","status":"affected"},{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"32b0a4ffcaea44a00a61e40c0d1bcc50362aee25","versionType":"git","status":"affected"},{"version":"0be7320a635c2e434e8b67e0e9474a85ceb421c4","lessThan":"471470bc7052d28ce125901877dd10e4c048e513","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["Documentation/arch/arm64/silicon-errata.rst","arch/arm64/Kconfig","arch/arm64/kernel/cpu_errata.c","arch/arm64/kernel/entry.S","arch/arm64/tools/cpucaps"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","versionType":"semver","status":"unaffected"},{"version":"6.1.57","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.5.7","lessThanOrEqual":"6.5.*","versionType":"semver","status":"unaffected"},{"version":"6.6","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

Initial Analysis by NIST 4/04/2025 10:59:11 AM

Action	Type	New Value
Added	CWE	NVD-CWE-noinfo
Added	CPE Configuration	OR cpe:2.3:o:linux:linux_kernel:6.6:rc1::::::* cpe:2.3:o:linux:linux_kernel:6.6:rc2::::::* cpe:2.3:o:linux:linux_kernel:6.6:rc3::::::* cpe:2.3:o:linux:linux_kernel:6.6:rc4::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.2 up to (excluding) 6.5.7 cpe:2.3:o:linux:linux_kernel::::::::* versions up to (excluding) 6.1.57
Added	Reference Type	CVE: https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513 Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c Types: Patch

New CVE Received from kernel.org 2/29/2024 1:15:46 AM

Action	Type	New Value
Added	Description	In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add Cortex-A520 speculative unprivileged load workaround Implement the workaround for ARM Cortex-A520 erratum 2966298. On an affected Cortex-A520 core, a speculatively executed unprivileged load might leak data from a privileged load via a cache side channel. The issue only exists for loads within a translation regime with the same translation (e.g. same ASID and VMID). Therefore, the issue only affects the return to EL0. The workaround is to execute a TLBI before returning to EL0 after all loads of privileged data. A non-shareable TLBI to any address is sufficient. The workaround isn't necessary if page table isolation (KPTI) is enabled, but for simplicity it will be. Page table isolation should normally be disabled for Cortex-A520 as it supports the CSV3 feature and the E0PD feature (used when KASLR is enabled).
Added	Reference	Linux https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 [No types assigned]
Added	Reference	Linux https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513 [No types assigned]
Added	Reference	Linux https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c [No types assigned]

Quick Info

CVE Dictionary Entry:
CVE-2023-52481
NVD Published Date:
02/29/2024
NVD Last Modified:
08/15/2026
Source:
kernel.org

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2023-52481 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by kernel.org 8/15/2026 9:17:44 AM

CVE Modified by CISA-ADP 6/17/2026 2:42:49 AM

CVE Modified by kernel.org 6/17/2026 2:42:49 AM

Initial Analysis by NIST 4/04/2025 10:59:11 AM

CVE Modified by CVE 11/21/2024 3:39:52 AM

CVE Modified by CISA-ADP 11/04/2024 3:35:02 PM

CVE Modified by kernel.org 5/28/2024 4:16:30 PM

CVE Modified by kernel.org 5/14/2024 10:22:28 AM

New CVE Received from kernel.org 2/29/2024 1:15:46 AM

Quick Info