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CVE-2025-40127 (GCVE-0-2025-40127)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:23 – Updated: 2026-05-11 21:43
VLAI
Title
hwrng: ks-sa - fix division by zero in ks_sa_rng_init
Summary
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(+)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < 692a04a1e0cde1d80a33df0078c755cf02cd7268 (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < d76b099011fa056950f63d05ebb6160991242f6a (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < eec7e0e19c1fa75dc65e25aa6a21ef24a03849af (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < f4238064379a91e71a9c258996acac43c50c2094 (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < 2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2 (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < 55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2 (git)
Affected: 6d01d8511dceb9cd40f72eb102b7d24f0b2e997b , < 612b1dfeb414dfa780a6316014ceddf9a74ff5c0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.195 , ≤ 5.15.* (semver)
Unaffected: 6.1.156 , ≤ 6.1.* (semver)
Unaffected: 6.6.112 , ≤ 6.6.* (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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(+)"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:16:00+00:00",
      "cve": "CVE-2025-40127",
      "id": "CVE-2025-40127",
      "initial_release_date": "2025-11-12T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: hwrng: ks-sa - fix division by zero in ks_sa_rng_init",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40127.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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