# CVE-2026-53314: padata: Put CPU offline callback in ONLINE section to allow failure CVE-2026-53314 is fixed in 55 products on 1 platform, first by ALAS2023-2026-1882, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-53314 - Priority: Routine - CVSS: 5.5 (Moderate) - EPSS: 0.0012 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 22, 2026 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53314 ## Description In the Linux kernel, the following vulnerability has been resolved: padata: Put CPU offline callback in ONLINE section to allow failure syzbot reported the following warning: DEAD callback error for CPU1 WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614 at commit 4ae12d8bd9a8 ("Merge tag 'kbuild-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux") which tglx traced to padata_cpu_dead() given it's the only sub-CPUHP_TEARDOWN_CPU callback that returns an error. Failure isn't allowed in hotplug states before CPUHP_TEARDOWN_CPU so move the CPU offline callback to the ONLINE section where failure is possible. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | bpftool-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | bpftool6.12 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | bpftool6.18 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-devel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-headers amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-livepatch-6.1.175-219.357 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-livepatch-6.12.92-122.166 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel-livepatch-6.18.33-63.124 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel-modules-extra amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel-tools-devel amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | kernel6.12 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-devel amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-headers amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-tools amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | kernel6.18 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-devel amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-headers amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-tools amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | linux Debian 12.15 (bookworm) | 6.1.176-1 | [DEBIAN-CVE-2026-53314](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53314.md) | Jun 27, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.94-1 | [DEBIAN-CVE-2026-53314](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53314.md) | Jun 27, 2026 | | Linux | linux Debian 14 | 7.0.10-1 | [DEBIAN-CVE-2026-53314](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53314.md) | Jun 27, 2026 | | Linux | perf amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | perf-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | perf6.12 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | perf6.18 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | python3-perf amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.175-219.357.amzn2023 | [ALAS2023-2026-1882](https://patchblox.com/security/data/fix/linux/alas2023-2026-1882.md) | Jun 22, 2026 | | Linux | python3-perf6.12 amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.92-122.166.amzn2023 | [ALAS2023-2026-1894](https://patchblox.com/security/data/fix/linux/alas2023-2026-1894.md) | Jun 22, 2026 | | Linux | python3-perf6.18 amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | | Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.33-63.124.amzn2023 | [ALAS2023-2026-1866](https://patchblox.com/security/data/fix/linux/alas2023-2026-1866.md) | Jun 22, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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