Unscored CVE-2025-71140 EUVD-2026-2476GHSA-fmmj-6v74-3cm2

media: mediatek: vcodec: Use spinlock for context list protection lock

Published Jan 14, 2026 · Updated May 27, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.14 Package: linux-aws-6.17 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.14 Package: linux-azure-6.17 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.14 Package: linux-azure-fde-6.2 Package: linux-azure-fde-6.8 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-azure-nvidia-6.14 Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.14 Package: linux-gcp-6.17 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.14 Package: linux-hwe-6.17 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.17 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.14 Package: linux-oem-6.17 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.14 Package: linux-oracle-6.17 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.14 Package: linux-realtime-6.17 Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.17 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

media: mediatek: vcodec: Use spinlock for context list protection lock

Previously a mutex was added to protect the encoder and decoder context
lists from unexpected changes originating from the SCP IP block, causing
the context pointer to go invalid, resulting in a NULL pointer
dereference in the IPI handler.

Turns out on the MT8173, the VPU IPI handler is called from hard IRQ
context. This causes a big warning from the scheduler. This was first
reported downstream on the ChromeOS kernels, but is also reproducible
on mainline using Fluster with the FFmpeg v4l2m2m decoders. Even though
the actual capture format is not supported, the affected code paths
are triggered.

Since this lock just protects the context list and operations on it are
very fast, it should be OK to switch to a spinlock.

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	6.6.27 – < 6.6.120, 6.8.6 – < 6.9, 6.9	6.6.120

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	linux	6.18.5-1	—
Debian 13	linux	6.12.69-1	DSA-6126-1

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu Nvidia-BlueField 24.04 LTS	linux-bluefield	6.8.0-1017.21	—
Ubuntu 25.10	linux	6.17.0-22.22	USN-8177-1
Ubuntu 25.10	linux-aws +1	6.17.0-1012.12	USN-8183-2, USN-8183-1
Ubuntu 25.10	linux-azure +1	6.17.0-1013.13	USN-8245-1
Ubuntu 25.10	linux-azure-fde	No fix yet	—
Ubuntu 25.10	linux-oracle	6.17.0-1011.11	USN-8183-2
Ubuntu 25.10	linux-realtime	6.17.0-1010.11	USN-8177-1
Ubuntu 25.10	linux-riscv	6.17.0-22.22.1	—
Ubuntu 24.04 LTS	linux	6.8.0-110.110	USN-8179-1
Ubuntu 24.04 LTS	linux-aws	6.8.0-1052.55	USN-8179-1
Ubuntu 24.04 LTS	linux-aws-6.17 +1	6.17.0-1012.12~24.04.1	USN-8183-2, USN-8183-1
Ubuntu 24.04 LTS	linux-azure	6.8.0-1054.60	USN-8258-1
Ubuntu 24.04 LTS	linux-azure-6.17	6.17.0-1013.13~24.04.1	USN-8245-1
Ubuntu 24.04 LTS	linux-azure-fde	6.8.0-1058.65	—
Ubuntu 24.04 LTS	linux-azure-nvidia	6.8.0-1039.42	—
Ubuntu 24.04 LTS	linux-gcp	6.8.0-1054.57	USN-8179-1
Ubuntu 24.04 LTS	linux-gke	6.8.0-1050.56	USN-8179-1
Ubuntu 24.04 LTS	linux-gkeop	6.8.0-1037.40	USN-8179-1
Ubuntu 24.04 LTS	linux-hwe-6.17	6.17.0-22.22~24.04.1	USN-8183-2
Ubuntu 24.04 LTS	linux-ibm	6.8.0-1051.51	USN-8179-1
Ubuntu 24.04 LTS	linux-lowlatency	6.8.0-110.110.1	USN-8179-1
Ubuntu 24.04 LTS	linux-nvidia	6.8.0-1051.54	USN-8185-1
Ubuntu 24.04 LTS	linux-nvidia-6.17	6.17.0-1018.18	—
Ubuntu 24.04 LTS	linux-nvidia-lowlatency	6.8.0-1051.54.1	USN-8185-2
Ubuntu 24.04 LTS	linux-nvidia-tegra	6.8.0-1022.22	USN-8265-1
Ubuntu 24.04 LTS	linux-oem-6.17	6.17.0-1020.20	USN-8245-1
Ubuntu 24.04 LTS	linux-oracle	6.8.0-1049.50	USN-8203-1
Ubuntu 24.04 LTS	linux-oracle-6.17	6.17.0-1011.11~24.04.1	USN-8183-2
Ubuntu 24.04 LTS	linux-raspi	6.8.0-1052.56	USN-8179-3
Ubuntu 24.04 LTS	linux-riscv +18	No fix yet	—
Ubuntu 24.04 LTS	linux-riscv-6.17	6.17.0-22.22.1~24.04.1	—
Ubuntu 24.04 LTS	linux-xilinx	6.8.0-1028.29	USN-8261-1
Ubuntu 22.04 LTS	linux-aws-6.8	6.8.0-1052.55~22.04.1	USN-8179-1
Ubuntu 22.04 LTS	linux-azure-6.8	6.8.0-1059.65~22.04.1	USN-8440-1
Ubuntu 22.04 LTS	linux-azure-fde-6.8	6.8.0-1058.65~22.04.1	—
Ubuntu 22.04 LTS	linux-gcp-6.8	6.8.0-1054.57~22.04.1	USN-8179-4
Ubuntu 22.04 LTS	linux-hwe-6.8 +1	6.8.0-110.110~22.04.1	USN-8179-3
Ubuntu 22.04 LTS	linux-ibm-6.8	6.8.0-1051.51~22.04.1	USN-8179-3
Ubuntu 22.04 LTS	linux-lowlatency-hwe-6.8	6.8.0-110.110.1~22.04.1	USN-8179-1
Ubuntu 22.04 LTS	linux-nvidia-6.8	6.8.0-1051.54~22.04.1	USN-8185-1
Ubuntu 22.04 LTS	linux-oracle-6.8	6.8.0-1049.50~22.04.1	USN-8203-1
Ubuntu 22.04 LTS	linux-riscv +32	No fix yet	—
Ubuntu 20.04 LTS	linux-gke +28	No fix yet	—

Show 5 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
Ubuntu 18.04 LTS	linux-gcp +14	No fix yet	—
Ubuntu 16.04 LTS	linux-hwe-edge	No fix yet	—
Ubuntu Pro Realtime 24.04 LTS	linux-raspi-realtime	6.8.0-2042.43	USN-8204-1
Ubuntu Pro Realtime 24.04 LTS	linux-realtime	6.8.1-1047.48	USN-8184-1
Ubuntu Pro Realtime 24.04 LTS	linux-realtime-6.14	No fix yet	—
Ubuntu Pro Realtime 24.04 LTS	linux-realtime-6.17	6.17.0-1010.11~24.04.1	USN-8177-2
Ubuntu Pro Realtime 22.04 LTS	linux-realtime-6.8	6.8.1-1047.48~22.04.1	USN-8184-1
Ubuntu Pro FIPS-updates 24.04 LTS	linux-aws-fips	6.8.0-1052.55+fips1	USN-8179-2
Ubuntu Pro FIPS-updates 24.04 LTS	linux-azure-fips	6.8.0-1053.59+fips1	—
Ubuntu Pro FIPS-updates 24.04 LTS	linux-fips	6.8.0-110.110+fips2	USN-8179-2
Ubuntu Pro FIPS-updates 24.04 LTS	linux-gcp-fips	6.8.0-1054.57+fips1	USN-8179-2

Advisories 20

WID-SEC-2026-0119 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
USN-8440-1 linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
USN-8179-1 linux, linux-aws, linux-aws-6.8, linux-gcp, linux-gke, linux-gkeop, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8183-2 linux-aws, linux-aws-6.17, linux-hwe-6.17, linux-oracle, linux-oracle-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8203-1 linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8184-1 linux-realtime, linux-realtime-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8204-1 linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8185-1 linux-nvidia, linux-nvidia-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8185-2 linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8179-3 linux-hwe-6.8, linux-ibm-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8265-1 linux-nvidia-tegra vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8258-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8179-4 linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8183-1 linux-gcp, linux-gcp-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8245-1 linux-azure, linux-azure-6.17, linux-oem-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8177-2 linux-realtime-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8179-2 linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8177-1 linux, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
USN-8261-1 linux-xilinx vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
DSA-6126-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026

References