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CVE-2025-39954— clk: sunxi-ng: mp: Fix dual-divider clock rate readback

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，该漏洞源于双分频时钟速率回读中未包含P分频器偏移量，可能导致时钟速率错误或为零。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1498.001 · Direct Network Flood

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 45717804b75eda8a76eacc04509ca4d68dd2caaf< 40108f69c372af3aea73e7829d6849a44638d662 affected
45717804b75eda8a76eacc04509ca4d68dd2caaf< 25fbbaf515acd13399589bd5ee6de5f35740cef2 affected
6.15 affected
< 6.15 unaffected
6.16.9≤ 6.16.* unaffected
6.17≤ * unaffected
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I. Basic Information for CVE-2025-39954

Vulnerability Information
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Vulnerability Title
clk: sunxi-ng: mp: Fix dual-divider clock rate readback
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: clk: sunxi-ng: mp: Fix dual-divider clock rate readback When dual-divider clock support was introduced, the P divider offset was left out of the .recalc_rate readback function. This causes the clock rate to become bogus or even zero (possibly due to the P divider being 1, leading to a divide-by-zero). Fix this by incorporating the P divider offset into the calculation.
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，该漏洞源于双分频时钟速率回读中未包含P分频器偏移量，可能导致时钟速率错误或为零。
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 45717804b75eda8a76eacc04509ca4d68dd2caaf ~ 40108f69c372af3aea73e7829d6849a44638d662 -
Linux Linux 6.15 -

II. Public POCs for CVE-2025-39954

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III. Intelligence Information for CVE-2025-39954

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Same Patch Batch · Linux · 2025-10-09 · 10 CVEs total

CVE-2025-39961 8.8 HIGH iommu/amd/pgtbl: Fix possible race while increase page table level
CVE-2025-39963 7.8 HIGH io_uring: fix incorrect io_kiocb reference in io_link_skb
CVE-2025-39956 7.8 HIGH igc: don't fail igc_probe() on LED setup error
CVE-2025-39962 7.5 HIGH rxrpc: Fix untrusted unsigned subtract
CVE-2025-39960 7.3 HIGH gpiolib: acpi: initialize acpi_gpio_info struct
CVE-2025-39957 7.1 HIGH wifi: mac80211: increase scan_ies_len for S1G
CVE-2025-39959 ASoC: amd: acp: Fix incorrect retrival of acp_chip_info
CVE-2025-39958 iommu/s390: Make attach succeed when the device was surprise removed
CVE-2025-39955 tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect().

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39954

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