CVE-2025-71140

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Source

https://cve.org/CVERecord?id=CVE-2025-71140

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71140.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2025-71140

Downstream

DEBIAN (1)

DEBIAN-CVE-2025-71140

DSA-6126-1

MGASA (2)

ROOT (2)

UBUNTU (1)

Published

2026-01-14T15:07:53Z

Modified

2026-10-08T02:49:10Z

Summary

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

Details

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.

Database specific

{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71140.json"
}

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

0a2dc707aa42214f9c4827bd57e344e29a0841d6

Fixed

2c1ea6214827041f548279c9eda341eda0cc8351

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6467cda18c9f9b5f2f9a0aa1e2861c653e41f382

Fixed

b92c19675f632a41af1222027a231bc2b7efa7ed

Fixed

3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1

Fixed

a5844227e0f030d2af2d85d4aed10c5eca6ca176

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.6.27

Fixed

6.6.120

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.8.6

Fixed

6.9

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

23aaf824121055ba81b55f75444355bd83c8eb38

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

41671f0c0182b2bae74ca7e3b0f155559e3e2fc5

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d

Affected versions

v6.*

v6.6.100

v6.6.101

v6.6.102

v6.6.103

v6.6.104

v6.6.105

v6.6.106

v6.6.107

v6.6.108

v6.6.109

v6.6.110

v6.6.111

v6.6.112

v6.6.113

v6.6.114

v6.6.115

v6.6.116

v6.6.117

v6.6.118

v6.6.119

v6.6.120

v6.6.121

v6.6.122

v6.6.123

v6.6.124

v6.6.125

v6.6.126

v6.6.127

v6.6.128

v6.6.129

v6.6.130

v6.6.131

v6.6.132

v6.6.133

v6.6.134

v6.6.135

v6.6.136

v6.6.137

v6.6.138

v6.6.139

v6.6.140

v6.6.141

v6.6.142

v6.6.143

v6.6.144

v6.6.145

v6.6.146

v6.6.147

v6.6.148

v6.6.149

v6.6.150

v6.6.151

v6.6.152

v6.6.153

v6.6.154

v6.6.155

v6.6.156

v6.6.157

v6.6.158

v6.6.27

v6.6.28

v6.6.29

v6.6.30

v6.6.31

v6.6.32

v6.6.33

v6.6.34

v6.6.35

v6.6.36

v6.6.37

v6.6.38

v6.6.39

v6.6.40

v6.6.41

v6.6.42

v6.6.43

v6.6.44

v6.6.45

v6.6.46

v6.6.47

v6.6.48

v6.6.49

v6.6.50

v6.6.51

v6.6.52

v6.6.53

v6.6.54

v6.6.55

v6.6.56

v6.6.57

v6.6.58

v6.6.59

v6.6.60

v6.6.61

v6.6.62

v6.6.63

v6.6.64

v6.6.65

v6.6.66

v6.6.67

v6.6.68

v6.6.69

v6.6.70

v6.6.71

v6.6.72

v6.6.73

v6.6.74

v6.6.75

v6.6.76

v6.6.77

v6.6.78

v6.6.79

v6.6.80

v6.6.81

v6.6.82

v6.6.83

v6.6.84

v6.6.85

v6.6.86

v6.6.87

v6.6.88

v6.6.89

v6.6.90

v6.6.91

v6.6.92

v6.6.93

v6.6.94

v6.6.95

v6.6.96

v6.6.97

v6.6.98

v6.6.99

v6.8.10

v6.8.11

v6.8.12

v6.8.6

v6.8.7

v6.8.8

v6.8.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71140.json"

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

6.6.120

Type: ECOSYSTEM
Events: Introduced

6.7.0

Fixed

6.12.64

Type: ECOSYSTEM
Events: Introduced

6.9.0

Fixed

6.18.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71140.json"