# CVE-2023-52576: linux: In the Linux kernel, the following vulnerability has been resolved: x86/mm, kexec, ima: Use memblock_free_late() fro... CVE-2023-52576 is fixed in 21 products on 1 platform, first by ALAS2023-2023-385, released October 12, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-52576 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0022 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 12, 2023 ## Description In the Linux kernel, the following vulnerability has been resolved: x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer() The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range(). With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic. Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-livepatch-6.1.56-82.125 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-modules-extra amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.64-1 | [DEBIAN-CVE-2023-52576](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52576.md) | Mar 2, 2024 | | Linux | linux Debian 13.5 (trixie) | 6.5.6-1 | [DEBIAN-CVE-2023-52576](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52576.md) | Mar 2, 2024 | | Linux | linux Debian 14 | 6.5.6-1 | [DEBIAN-CVE-2023-52576](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52576.md) | Mar 2, 2024 | | Linux | perf amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | python3-perf amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.56-82.125.amzn2023 | [ALAS2023-2023-385](https://patchblox.com/security/data/fix/linux/alas2023-2023-385.md) | Oct 12, 2023 | --- Data as of 2026-11-09T01:18:40Z UTC. 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