Out-of-bounds write in Linux kernel - CVE-2026-43048

Vulnerability identifier: #VU128859

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-43048

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read and out-of-bounds write in hid_report_raw_event() when processing an incoming event buffer that is smaller than the associated report size. A local attacker can provide a crafted HID event buffer to cause a denial of service.

Linux kernel
openEuler
python3-perf-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
kernel-headers
kernel-extra-modules

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
bpftool - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
bpftool-debuginfo - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-debuginfo - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-debugsource - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-devel - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-source - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-tools - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-tools-debuginfo - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-tools-devel - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
perf - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
perf-debuginfo - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
python2-perf - update to 4.19.90-2605.4.0.0373
python2-perf-debuginfo - update to 4.19.90-2605.4.0.0373
python3-perf - addressed in versions 4.19.90-2605.4.0.0373, 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-headers - addressed in versions 5.10.0-315.0.0.218, 6.6.0-145.0.12.138, 6.6.0-145.1.12.150, 6.6.0-145.3.12.142
kernel-extra-modules - update to 6.6.0-145.3.12.142

• https://git.kernel.org/stable/c/0a3fe972a7cb1404f693d6f1711f32bc1d244b1c
• https://git.kernel.org/stable/c/8f71034649738fdeb6859b8d6cddf132024fac06
• https://git.kernel.org/stable/c/bd6e1d0230cca9575f5d118148f51e2a56b5373f

• Out-of-bounds write in Linux kernel hid driver
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS update for kernel
• openEuler 22.03 LTS SP4 update for kernel
• openEuler 20.03 LTS SP4 update for kernel