CVE-2025-40301

Bluetooth: hci_event: validate skb length for unknown CC opcode

CVE-2025-40301 is fixed in 84 products on 1 platform, first by DEBIAN-CVE-2025-40301, released December 8, 2025. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate skb length for unknown CC opcode In hci_cmd_complete_evt(), if the command complete event has an unknown opcode, we assume the first byte of the remaining skb->data contains the return status. However, parameter data has previously been pulled in hci_event_func(), which may leave the skb empty. If so, using skb->data[0] for the return status uses un-init memory. The fix is to check skb->len before using skb->data.

Where it's fixed

ProductFixed inFixReleased
Linux
dtb-aarch64 · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
dtb-aarch64 · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel · RHEL 10 6.12.0-55.58.1.el10_0 RHSA-2026:1727 Dec 16, 2025
kernel · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel · rocky 10 0:6.12.0-124.31.1.el10_1 RLSA-2026:1690 Feb 8, 2026
kernel-64kb · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-64kb · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-64kb · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-64kb · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
kernel-abi-stablelists · almalinux 10 6.12.0-124.31.1.el10_1 ALSA-2026:1690 Feb 2, 2026
kernel-abi-stablelists · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 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 15.7 6.4.0-150700.20.24.1 SUSE-SU-2026:0281-1 Jan 23, 2026
kernel-azure · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
kernel-core · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-cross-headers · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-debug-core · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-devel · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-devel-matched · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-modules · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-modules-core · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-modules-extra · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-debug-uki-virt · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-default · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-default · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-default · sles 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-default · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 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 15.6 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1 Jan 26, 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 15.6 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.28.1.150700.17.19.1 SUSE-SU-2026:0315-1 Jan 28, 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-devel · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-devel-matched · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-doc · almalinux 10 6.12.0-124.31.1.el10_1 ALSA-2026:1690 Feb 2, 2026
kernel-doc · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-docs · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-docs · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-docs · sles 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-docs · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
kernel-headers · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-kvmsmall · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 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-SLE15-SP6_Update_19 · sles 15.6 1-150600.13.3.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-livepatch-SLE15-SP7-RT_Update_8 · sles 15.7 1-150700.1.3.1 SUSE-SU-2026:0278-1 Jan 23, 2026
kernel-livepatch-SLE15-SP7_Update_8 · sles 15.7 1-150700.15.3.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-modules · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-modules-core · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-modules-extra · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-modules-extra-matched · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-obs-build · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-obs-build · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-obs-build · sles 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-obs-qa · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 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 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-source · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-source · sles 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-source · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-source · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
kernel-source-azure · sles 15.7 6.4.0-150700.20.24.1 SUSE-SU-2026:0281-1 Jan 23, 2026
kernel-syms · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-syms · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-syms · sles 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-syms · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
kernel-syms-azure · sles 15.7 6.4.0-150700.20.24.1 SUSE-SU-2026:0281-1 Jan 23, 2026
kernel-tools · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-tools-libs · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-tools-libs-devel · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-uek · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-devel · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-devel · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-doc · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-doc · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-tools · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek-tools · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-107.59.3.2.el9uek ELSA-2026-50006 Jan 13, 2026
kernel-uki-virt · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-uki-virt-addons · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
kernel-zfcpdump · opensuse-leap 15.6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1 Jan 26, 2026
kernel-zfcpdump · opensuse-leap 16.0 6.12.0-160000.9.1 OPENSUSE-SU-2026:20145-1 Feb 2, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1 Jan 28, 2026
kernel-zfcpdump · sles 16.0 6.12.0-160000.9.1 SUSE-SU-2026:20220-1 Feb 2, 2026
libperf · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
linux · Debian 12.15 (bookworm) 6.1.159-1 DEBIAN-CVE-2025-40301 Dec 8, 2025
linux · Debian 13.5 (trixie) 6.12.63-1 DEBIAN-CVE-2025-40301 Dec 8, 2025
linux · Debian 14 6.17.8-1 DEBIAN-CVE-2025-40301 Dec 8, 2025
perf · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
python3-perf · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
rtla · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026
rv · ol 10 0:6.12.0-124.31.1.el10_1 ELSA-2026-1690 Feb 2, 2026

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