{"cve":"CVE-2023-52481","nvd":{"published":"2024-02-29T06:15:46.060","modified":"2026-08-15T13:17:44.117","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: errata: Add Cortex-A520 speculative unprivileged load workaround\n\nImplement the workaround for ARM Cortex-A520 erratum 2966298. On an\naffected Cortex-A520 core, a speculatively executed unprivileged load\nmight leak data from a privileged load via a cache side channel. The\nissue only exists for loads within a translation regime with the same\ntranslation (e.g. same ASID and VMID). Therefore, the issue only affects\nthe return to EL0.\n\nThe workaround is to execute a TLBI before returning to EL0 after all\nloads of privileged data. A non-shareable TLBI to any address is\nsufficient.\n\nThe workaround isn't necessary if page table isolation (KPTI) is\nenabled, but for simplicity it will be. Page table isolation should\nnormally be disabled for Cortex-A520 as it supports the CSV3 feature\nand the E0PD feature (used when KASLR is enabled).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L","score":4.7},"cwes":[],"references":["https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25","https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513","https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c","https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25","https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2023-52481","score":0.00602,"percentile":0.48796,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}