CVE-2025-40266
KVM: arm64: Check the untrusted offset in FF-A memory share
CVE-2025-40266 is fixed in 71 products on 1 platform, first by DEBIAN-CVE-2025-40266, released December 4, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.2
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
5th percentile
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Check the untrusted offset in FF-A memory share Verify the offset to prevent OOB access in the hypervisor FF-A buffer in case an untrusted large enough value [U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX] is set from the host kernel.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.9.1.160000.2.6 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.9.1.160000.2.6 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-livepatch-6.12.63-84.121 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-uek · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-devel · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-devel · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-deprecated · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-deprecated · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-desktop · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-desktop · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-extra · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-extra · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-usb · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-usb · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-wireless · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-debug-modules-wireless · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-devel · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-devel · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-doc · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-doc · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-deprecated · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-deprecated · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-desktop · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-desktop · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-extra · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-extra · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-extra-netfilter · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-extra-netfilter · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-usb · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-usb · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-wireless · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-modules-wireless · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-tools · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek-tools · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-devel · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-devel · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-core · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-core · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-deprecated · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-deprecated · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-desktop · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-desktop · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-extra · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-extra · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-usb · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-usb · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-wireless · ol 10 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-uek64k-modules-wireless · ol 9 | 0:6.12.0-108.64.6.3.el9uek | ELSA-2026-50112 | Feb 20, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-headers · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.63-1 | DEBIAN-CVE-2025-40266 | Dec 4, 2025 |
| linux · Debian 14 | 6.17.10-1 | DEBIAN-CVE-2025-40266 | Dec 4, 2025 |
| perf6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| python3-perf6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
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