CVE-2025-40127
In the Linux kernel, the following vulnerability has been resolved: hwrng: ks-sa - fix division by zero in ks_sa_rng_init Fix division by zero in ks_sa_rng_init caused by missing clock pointer initialization. The clk_get_rate() call is performed on an uninitialized clk pointer, resulting in division by zero when calculating delay values. Add clock initialization code before using the clock. drivers/char/hw_random/ks-sa-rng.c | 7 +++++++ 1 file changed, 7 insertions(+)
Affected versions
Linux kernel versions
5.5
and later are affected. Fixed in
5.10.246,
5.15.195,
6.1.156,
6.6.112,
6.12.53,
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40127 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2
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PatchKernel patch commithttps://git.kernel.org/stable/c/55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2
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PatchKernel patch commithttps://git.kernel.org/stable/c/612b1dfeb414dfa780a6316014ceddf9a74ff5c0
Frequently asked questions
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What is CVE-2025-40127?
CVE-2025-40127 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.5 onward and has been patched in 5.10.246, 5.15.195, 6.1.156 and others. CVE-2025-40127 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-40127?
Yes — CVE-2025-40127 has been patched. Fixed versions include 5.10.246, 5.15.195, 6.1.156 and others. If you are running Linux kernel 5.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40127 actively exploited?
No — CVE-2025-40127 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.