Out-of-bounds read in Linux kernel - CVE-2026-63947

Vulnerability identifier: #VU138700

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-63947

CWE-ID: CWE-125

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in hidp_input_report() when processing truncated Bluetooth HIDP input packets. A remote user can send a specially crafted truncated packet to disclose sensitive information.

Exploitation requires a paired Bluetooth device.

Linux kernel
openEuler
Ubuntu
kernel-debuginfo
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
bpftool-debuginfo
bpftool
kernel
python3-perf
python3-perf-debuginfo
linux-ibm (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-debuginfo - update to 5.10.0-329.0.0.230
perf-debuginfo - update to 5.10.0-329.0.0.230
perf - update to 5.10.0-329.0.0.230
kernel-tools-devel - update to 5.10.0-329.0.0.230
kernel-tools-debuginfo - update to 5.10.0-329.0.0.230
kernel-tools - update to 5.10.0-329.0.0.230
kernel-source - update to 5.10.0-329.0.0.230
kernel-headers - update to 5.10.0-329.0.0.230
kernel-devel - update to 5.10.0-329.0.0.230
kernel-debugsource - update to 5.10.0-329.0.0.230
bpftool-debuginfo - update to 5.10.0-329.0.0.230
bpftool - update to 5.10.0-329.0.0.230
kernel - update to 5.10.0-329.0.0.230
python3-perf - update to 5.10.0-329.0.0.230
python3-perf-debuginfo - update to 5.10.0-329.0.0.230
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

• https://git.kernel.org/stable/c/1f08a90013e1e632b34321334e861fcefc056505
• https://git.kernel.org/stable/c/2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6
• https://git.kernel.org/stable/c/6348dfed5b0f9c6074f14322332e97493d32fef0
• https://git.kernel.org/stable/c/b83dcacd2ec7fcc5a48be215f82d573759f87ec2
• https://git.kernel.org/stable/c/cc3832b19f863e3677c5651f001a2e3795f39eb8
• https://git.kernel.org/stable/c/d313683d6ccdd8c01e0562270a2ae25b86d8461d
• https://git.kernel.org/stable/c/d7d6a81b8dd1a8d084a1b755db9406041d53adb5

• Out-of-bounds read in Linux kernel bluetooth hidp
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• openEuler 22.03 LTS SP4 update for kernel
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia