CVE-2025-39823
KVM: x86: use array_index_nospec with indices that come from guest
CVE-2025-39823 is fixed in 68 products on 1 platform, first by ALAS2023-2025-1186, released September 10, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0018
7th percentile
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: use array_index_nospec with indices that come from guest min and dest_id are guest-controlled indices. Using array_index_nospec() after the bounds checks clamps these values to mitigate speculative execution side-channels.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| bpftool-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| bpftool6.12 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| dtb-aarch64 · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-64kb · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-64kb · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.15.2 | SUSE-SU-2025:03633-1 | Oct 17, 2025 |
| kernel-debug · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-debuginfo-common-aarch64 · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-debuginfo-common-x86_64 · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-default · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-default-base · opensuse-leap 15.6 | 6.4.0-150600.23.73.1.150600.12.32.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.6.1.160000.2.4 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.73.1.150600.12.32.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.19.1.150700.17.13.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-devel · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-docs · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-headers · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-kvmsmall · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-libbpf · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-libbpf-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-libbpf-devel · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-libbpf-static · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-livepatch-6.1.150-174.273 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-livepatch-6.12.46-66.121 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel-livepatch-SLE15-SP6-RT_Update_16 · sles 15.6 | 1-150600.1.3.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-livepatch-SLE15-SP6_Update_16 · sles 15.6 | 1-150600.13.3.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-livepatch-SLE15-SP7-RT_Update_5 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2025:3725-1 | Oct 22, 2025 |
| kernel-livepatch-SLE15-SP7_Update_5 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-modules-extra · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-modules-extra-common · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-obs-build · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-obs-qa · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-rt_debug · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-source · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-source-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-source-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.15.2 | SUSE-SU-2025:03633-1 | Oct 17, 2025 |
| kernel-source-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-syms · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-syms-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-syms-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.15.1 | SUSE-SU-2025:03633-1 | Oct 17, 2025 |
| kernel-syms-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-tools · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-tools-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-tools-devel · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| kernel-zfcpdump · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-zfcpdump · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.19.1 | SUSE-SU-2025:03601-1 | Oct 15, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel6.12 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-devel · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-headers · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-tools · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| linux · Debian 12.15 (bookworm) | 6.1.153-1 | DEBIAN-CVE-2025-39823 | Sep 16, 2025 |
| linux · Debian 13.5 (trixie) | 6.12.48-1 | DEBIAN-CVE-2025-39823 | Sep 16, 2025 |
| linux · Debian 14 | 6.16.5-1 | DEBIAN-CVE-2025-39823 | Sep 16, 2025 |
| perf · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| perf-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| perf6.12 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| python3-perf · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| python3-perf-debuginfo · amzn 2023 | 1:6.1.150-174.273.amzn2023 | ALAS2023-2025-1186 | Sep 10, 2025 |
| python3-perf6.12 · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.46-66.121.amzn2023 | ALAS2023-2025-1208 | Sep 23, 2025 |
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