{"id":"CVE-2025-40127","state":"PUBLISHED","title":"hwrng: ks-sa - fix division by zero in ks_sa_rng_init","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: ks-sa - fix division by zero in ks_sa_rng_init\n\nFix division by zero in ks_sa_rng_init caused by missing clock\npointer initialization. The clk_get_rate() call is performed on\nan uninitialized clk pointer, resulting in division by zero when\ncalculating delay values.\n\nAdd clock initialization code before using the clock.\n\n\n drivers/char/hw_random/ks-sa-rng.c | 7 +++++++\n 1 file changed, 7 insertions(+)","publishedAt":"2025-11-12T10:23:20.775Z","updatedAt":"2026-05-11T21:43:17.660Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"692a04a1e0cde1d80a33df0078c755cf02cd7268","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"d76b099011fa056950f63d05ebb6160991242f6a","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"eec7e0e19c1fa75dc65e25aa6a21ef24a03849af","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"f4238064379a91e71a9c258996acac43c50c2094","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"612b1dfeb414dfa780a6316014ceddf9a74ff5c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/ks-sa-rng.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/ks-sa-rng.c"]}],"references":["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","https://git.kernel.org/stable/c/2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2","https://git.kernel.org/stable/c/55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2","https://git.kernel.org/stable/c/612b1dfeb414dfa780a6316014ceddf9a74ff5c0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40127.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40127","state":"PUBLISHED","datePublished":"2025-11-12T10:23:20.775Z","dateUpdated":"2026-05-11T21:43:17.660Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.169Z"},"containers":{"cna":{"title":"hwrng: ks-sa - fix division by zero in ks_sa_rng_init","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: ks-sa - fix division by zero in ks_sa_rng_init\n\nFix division by zero in ks_sa_rng_init caused by missing clock\npointer initialization. The clk_get_rate() call is performed on\nan uninitialized clk pointer, resulting in division by zero when\ncalculating delay values.\n\nAdd clock initialization code before using the clock.\n\n\n drivers/char/hw_random/ks-sa-rng.c | 7 +++++++\n 1 file changed, 7 insertions(+)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"692a04a1e0cde1d80a33df0078c755cf02cd7268","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"d76b099011fa056950f63d05ebb6160991242f6a","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"eec7e0e19c1fa75dc65e25aa6a21ef24a03849af","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"f4238064379a91e71a9c258996acac43c50c2094","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2","versionType":"git"},{"version":"6d01d8511dceb9cd40f72eb102b7d24f0b2e997b","status":"affected","lessThan":"612b1dfeb414dfa780a6316014ceddf9a74ff5c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/ks-sa-rng.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/ks-sa-rng.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/692a04a1e0cde1d80a33df0078c755cf02cd7268"},{"url":"https://git.kernel.org/stable/c/d76b099011fa056950f63d05ebb6160991242f6a"},{"url":"https://git.kernel.org/stable/c/eec7e0e19c1fa75dc65e25aa6a21ef24a03849af"},{"url":"https://git.kernel.org/stable/c/f4238064379a91e71a9c258996acac43c50c2094"},{"url":"https://git.kernel.org/stable/c/2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2"},{"url":"https://git.kernel.org/stable/c/55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2"},{"url":"https://git.kernel.org/stable/c/612b1dfeb414dfa780a6316014ceddf9a74ff5c0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:43:17.660Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}