CVE-2025-39954

clk: sunxi-ng: mp: Fix dual-divider clock rate readback

MEDIUM
5.5
CVSS Score
Published: October 9, 2025 at 09:47 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.15 ≤ v < 6.16.945717804b75eda8a76eacc04509ca4d68dd2caaf6.156.176.17 rc16.17 rc26.17 rc36.17 rc46.17 rc56.17 rc6
Vendor states this is fixed in 25fbbaf515acd13399589bd5ee6de5f35740cef2 (fixed)
Vendor states this is fixed in 40108f69c372af3aea73e7829d6849a44638d662 (fixed)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.16.9 (unaffected)
Vendor states this is fixed in 6.17 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-369

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