arm64: errata: Add Cortex-A520 speculative unprivileged load workaround
Summary
| CVE | CVE-2023-52481 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2024-02-29 06:15:46 UTC |
| Updated | 2026-08-15 13:17:44 UTC |
| 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). |
Risk And Classification
Primary CVSS: v3.1 4.7 MEDIUM from ADP
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Problem Types: NVD-CWE-noinfo | CWE-noinfo Not enough information
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 4.7 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 4.7 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 60ffc30d5652810dd34ea2eec41504222f5d5791 6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c git | Not specified |
| CNA | Linux | Linux | affected 60ffc30d5652810dd34ea2eec41504222f5d5791 32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 git | Not specified |
| CNA | Linux | Linux | affected 60ffc30d5652810dd34ea2eec41504222f5d5791 471470bc7052d28ce125901877dd10e4c048e513 git | Not specified |
| CNA | Linux | Linux | affected 3.7 | Not specified |
| CNA | Linux | Linux | unaffected 3.7 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.57 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.5.7 6.5.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.