CVE-2025-40127
Published Nov 12, 2025
Modified Apr 15, 2026
Description
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(+)
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References
Other References
https://git.kernel.org/stable/c/2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2
https://git.kernel.org/stable/c/55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2
https://git.kernel.org/stable/c/612b1dfeb414dfa780a6316014ceddf9a74ff5c0
https://git.kernel.org/stable/c/692a04a1e0cde1d80a33df0078c755cf02cd7268
https://git.kernel.org/stable/c/d76b099011fa056950f63d05ebb6160991242f6a
https://git.kernel.org/stable/c/eec7e0e19c1fa75dc65e25aa6a21ef24a03849af
https://git.kernel.org/stable/c/f4238064379a91e71a9c258996acac43c50c2094
Frequently Asked Questions
What is 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(+)
How do I check if I'm vulnerable to CVE-2025-40127? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.