# CVE-2026-89992: cpuidle: dt_idle_genpd: kfree() the original name allocation

CVE-2026-89992 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-89992, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-89992
- Priority: High
- CVSS: 8.4 (Important)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89992

## Description

In the Linux kernel, the following vulnerability has been resolved:  cpuidle: dt_idle_genpd: kfree() the original name allocation  dt_idle_pd_alloc() kasprintf()s the full node path, then points pd->name at kbasename() of that string. dt_idle_pd_free() kfree()s pd->name, which is no longer the start of the allocation.  Copy the basename instead.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | bpftool-debuginfo amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | bpftool6.12 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | bpftool6.18 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-debuginfo amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-devel amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-headers amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-livepatch-6.1.188-233.385 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-livepatch-6.12.110-135.201 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel-livepatch-6.18.51-120.162 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel-modules-extra amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-tools amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel-tools-devel amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | kernel6.18 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-devel amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-headers amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-tools amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.190-1 | [DEBIAN-CVE-2026-89992](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89992.md) | Sep 23, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.111-1 | [DEBIAN-CVE-2026-89992](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89992.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89992](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89992.md) | Sep 23, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.111-1~deb12u1 | [DEBIAN-CVE-2026-89992](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89992.md) | Sep 23, 2026 |
| Linux | microvm-kernel6.18 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | perf amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | perf-debuginfo amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | perf6.12 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | perf6.18 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | python3-perf amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.188-233.385.amzn2023 | [ALAS2023-2026-3197](https://patchblox.com/security/data/fix/linux/alas2023-2026-3197.md) | Nov 7, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.110-135.201.amzn2023 | [ALAS2023-2026-3196](https://patchblox.com/security/data/fix/linux/alas2023-2026-3196.md) | Nov 7, 2026 |
| Linux | python3-perf6.18 amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |
| Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.51-120.162.amzn2023 | [ALAS2023-2026-3187](https://patchblox.com/security/data/fix/linux/alas2023-2026-3187.md) | Nov 7, 2026 |

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