Buffer overflow in Linux kernel - CVE-2025-39918

Vulnerability identifier: #VU116251

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-2025-39918

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory corruption within the mt76_txq_schedule_pending_wcid() and mt76_txq_schedule_pending() functions in drivers/net/wireless/mediatek/mt76/tx.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel (Red Hat package)
kernel-64k-debuginfo (Red Hat package)
kernel-64k-devel (Red Hat package)
kernel-64k-debug-modules-extra (Red Hat package)
kernel-64k-debug-modules (Red Hat package)
kernel-64k-debug-devel-matched (Red Hat package)
kernel-64k-debug-devel (Red Hat package)
kernel-64k-debug-core (Red Hat package)
kernel-64k-debug (Red Hat package)
kernel-64k (Red Hat package)
kernel-zfcpdump-modules-extra (Red Hat package)
kernel-zfcpdump-modules-core (Red Hat package)
kernel-zfcpdump-modules (Red Hat package)
kernel-zfcpdump-devel-matched (Red Hat package)
kernel-zfcpdump-devel (Red Hat package)
kernel-zfcpdump-debuginfo (Red Hat package)
kernel-zfcpdump-core (Red Hat package)
kernel-zfcpdump (Red Hat package)
kernel-debuginfo-common-s390x (Red Hat package)
kernel-debuginfo (Red Hat package)
rv (Red Hat package)
kernel-rt-64k-debug-modules-extra (Red Hat package)
libperf (Red Hat package)
kernel-tools-libs-devel (Red Hat package)
kernel-cross-headers (Red Hat package)
kernel-rt-debuginfo (Red Hat package)
kernel-rt-64k-modules-extra (Red Hat package)
kernel-rt-64k-modules-core (Red Hat package)
kernel-rt-64k-modules (Red Hat package)
kernel-rt-64k-devel (Red Hat package)
kernel-rt-64k-debuginfo (Red Hat package)
python3-perf-debuginfo (Red Hat package)
kernel-rt-64k-debug-modules-core (Red Hat package)
kernel-rt-64k-debug-modules (Red Hat package)
kernel-rt-64k-debug-devel (Red Hat package)
kernel-rt-64k-debug-core (Red Hat package)
kernel-rt-64k-debug (Red Hat package)
kernel-rt-64k-core (Red Hat package)
kernel-rt-64k (Red Hat package)
kernel-debuginfo-common-aarch64 (Red Hat package)
kernel-64k-devel-matched (Red Hat package)
kernel-debug-uki-virt (Red Hat package)
kernel-rt-core (Red Hat package)
kernel-rt (Red Hat package)
kernel-modules-extra (Red Hat package)
kernel-modules-core (Red Hat package)
kernel-modules (Red Hat package)
kernel-headers (Red Hat package)
kernel-devel-matched (Red Hat package)
kernel-devel (Red Hat package)
kernel-debuginfo-common-x86_64 (Red Hat package)
kernel-rt-debug (Red Hat package)
kernel-debug-modules-extra (Red Hat package)
kernel-debug-modules-core (Red Hat package)
kernel-debug-modules (Red Hat package)
kernel-debug-devel-matched (Red Hat package)
kernel-debug-devel (Red Hat package)
kernel-debug-debuginfo (Red Hat package)
kernel-debug-core (Red Hat package)
kernel-debug (Red Hat package)
kernel-rt-modules-extra (Red Hat package)
python3-perf (Red Hat package)
perf-debuginfo (Red Hat package)
perf (Red Hat package)
libperf-debuginfo (Red Hat package)
kernel-uki-virt-addons (Red Hat package)
kernel-uki-virt (Red Hat package)
kernel-tools-libs (Red Hat package)
kernel-tools-debuginfo (Red Hat package)
kernel-tools (Red Hat package)
rtla (Red Hat package)
kernel-rt-modules-core (Red Hat package)
kernel-rt-modules (Red Hat package)
kernel-rt-devel (Red Hat package)
kernel-rt-debug-modules-extra (Red Hat package)
kernel-rt-debug-modules-core (Red Hat package)
kernel-rt-debug-modules (Red Hat package)
kernel-rt-debug-devel (Red Hat package)
kernel-rt-debug-debuginfo (Red Hat package)
kernel-rt-debug-core (Red Hat package)

Install update from vendor's repository.

kernel (Red Hat package) - addressed in versions 5.14.0-570.69.1.el9_6, 5.14.0-611.11.1.el9_7
kernel-64k-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug-devel-matched (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-debug (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-devel-matched (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-zfcpdump (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debuginfo-common-s390x (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
rv (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
libperf (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-tools-libs-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-cross-headers (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
python3-perf-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-debug (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-64k (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debuginfo-common-aarch64 (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-64k-devel-matched (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-uki-virt (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-headers (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-devel-matched (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debuginfo-common-x86_64 (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-devel-matched (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-debug (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
python3-perf (Red Hat package) - update to 5.14.0-611.11.1.el9_7
perf-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
perf (Red Hat package) - update to 5.14.0-611.11.1.el9_7
libperf-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-uki-virt-addons (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-uki-virt (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-tools-libs (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-tools-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-tools (Red Hat package) - update to 5.14.0-611.11.1.el9_7
rtla (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-modules-extra (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-modules-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-modules (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-devel (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-debuginfo (Red Hat package) - update to 5.14.0-611.11.1.el9_7
kernel-rt-debug-core (Red Hat package) - update to 5.14.0-611.11.1.el9_7

• https://git.kernel.org/stable/c/49fba87205bec14a0f6bd997635bf3968408161e
• https://git.kernel.org/stable/c/c91a59b04f928cb4a1436b0e0a27650883d0388a
• https://git.kernel.org/stable/c/e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835

• Buffer overflow in Linux kernel mediatek mt76 driver
• Red Hat Enterprise Linux 9 update for kernel
• Red Hat Enterprise Linux 9 update for kernel