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CVE-2025-71140— media: mediatek: vcodec: Use spinlock for context list protection lock

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在硬IRQ上下文中使用互斥锁保护上下文列表，可能导致调度器警告。

AI Predicted 5.5 Difficulty: Easy EPSS 0.19% · P8

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux 0a2dc707aa42214f9c4827bd57e344e29a0841d6< 2c1ea6214827041f548279c9eda341eda0cc8351 affected
6467cda18c9f9b5f2f9a0aa1e2861c653e41f382< b92c19675f632a41af1222027a231bc2b7efa7ed affected
6467cda18c9f9b5f2f9a0aa1e2861c653e41f382< 3e858938b0e659f6ec9ddcf853a87f1c5c3f44e1 affected
6467cda18c9f9b5f2f9a0aa1e2861c653e41f382< a5844227e0f030d2af2d85d4aed10c5eca6ca176 affected
23aaf824121055ba81b55f75444355bd83c8eb38 affected
41671f0c0182b2bae74ca7e3b0f155559e3e2fc5 affected
51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d affected
6.6.27< 6.6.120 affected
… +7 more rows
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I. Basic Information for CVE-2025-71140

Vulnerability Information
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Vulnerability Title
media: mediatek: vcodec: Use spinlock for context list protection lock
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在硬IRQ上下文中使用互斥锁保护上下文列表，可能导致调度器警告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0a2dc707aa42214f9c4827bd57e344e29a0841d6 ~ 2c1ea6214827041f548279c9eda341eda0cc8351 -
Linux Linux 6.9 -

II. Public POCs for CVE-2025-71140

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III. Intelligence Information for CVE-2025-71140

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71120 7.5 HIGH SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71107 f2fs: ensure node page reads complete before f2fs_put_super() finishes
CVE-2025-71110 mm/slub: reset KASAN tag in defer_free() before accessing freed memory
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71113 crypto: af_alg - zero initialize memory allocated via sock_kmalloc
CVE-2025-71114 via_wdt: fix critical boot hang due to unnamed resource allocation
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71102 scs: fix a wrong parameter in __scs_magic
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71122 iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71140

Anonymous User
2026-01-15 06:08:11

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