{"id":"CVE-2025-39954","state":"PUBLISHED","title":"clk: sunxi-ng: mp: Fix dual-divider clock rate readback","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: sunxi-ng: mp: Fix dual-divider clock rate readback\n\nWhen dual-divider clock support was introduced, the P divider offset was\nleft out of the .recalc_rate readback function. This causes the clock\nrate to become bogus or even zero (possibly due to the P divider being\n1, leading to a divide-by-zero).\n\nFix this by incorporating the P divider offset into the calculation.","publishedAt":"2025-10-09T09:47:32.825Z","updatedAt":"2026-05-11T21:39:38.246Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"45717804b75eda8a76eacc04509ca4d68dd2caaf","status":"affected","lessThan":"40108f69c372af3aea73e7829d6849a44638d662","versionType":"git"},{"version":"45717804b75eda8a76eacc04509ca4d68dd2caaf","status":"affected","lessThan":"25fbbaf515acd13399589bd5ee6de5f35740cef2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/sunxi-ng/ccu_mp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.16.9","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/sunxi-ng/ccu_mp.c"]}],"references":["https://git.kernel.org/stable/c/40108f69c372af3aea73e7829d6849a44638d662","https://git.kernel.org/stable/c/25fbbaf515acd13399589bd5ee6de5f35740cef2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/39xxx/CVE-2025-39954.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39954","state":"PUBLISHED","datePublished":"2025-10-09T09:47:32.825Z","dateUpdated":"2026-05-11T21:39:38.246Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.149Z"},"containers":{"cna":{"title":"clk: sunxi-ng: mp: Fix dual-divider clock rate readback","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: sunxi-ng: mp: Fix dual-divider clock rate readback\n\nWhen dual-divider clock support was introduced, the P divider offset was\nleft out of the .recalc_rate readback function. This causes the clock\nrate to become bogus or even zero (possibly due to the P divider being\n1, leading to a divide-by-zero).\n\nFix this by incorporating the P divider offset into the calculation."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"45717804b75eda8a76eacc04509ca4d68dd2caaf","status":"affected","lessThan":"40108f69c372af3aea73e7829d6849a44638d662","versionType":"git"},{"version":"45717804b75eda8a76eacc04509ca4d68dd2caaf","status":"affected","lessThan":"25fbbaf515acd13399589bd5ee6de5f35740cef2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/sunxi-ng/ccu_mp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.16.9","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/sunxi-ng/ccu_mp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/40108f69c372af3aea73e7829d6849a44638d662"},{"url":"https://git.kernel.org/stable/c/25fbbaf515acd13399589bd5ee6de5f35740cef2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:39:38.246Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.16.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}