# CVE-2023-52481: linux: In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add Cortex-A520 speculative unpri... CVE-2023-52481 is fixed in 21 products on 1 platform, first by ALAS2023-2023-422, released October 30, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-52481 - Priority: Routine - CVSS: 4.7 (medium) - EPSS: 0.0060 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 30, 2023 ## 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). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-livepatch-6.1.59-84.139 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-modules-extra amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.64-1 | [DEBIAN-CVE-2023-52481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52481.md) | Feb 29, 2024 | | Linux | linux Debian 13.5 (trixie) | 6.5.8-1 | [DEBIAN-CVE-2023-52481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52481.md) | Feb 29, 2024 | | Linux | linux Debian 14 | 6.5.8-1 | [DEBIAN-CVE-2023-52481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52481.md) | Feb 29, 2024 | | Linux | perf amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | python3-perf amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.59-84.139.amzn2023 | [ALAS2023-2023-422](https://patchblox.com/security/data/fix/linux/alas2023-2023-422.md) | Oct 30, 2023 | --- Data as of 2026-11-09T13:31:49Z UTC. 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