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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6843 records in the last 180 days details
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.
Show details on NVD website
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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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            "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(+)"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nhwrng: ks-sa - soluciona la divisi\u00f3n por cero en ks_sa_rng_init\n\nCorrige la divisi\u00f3n por cero en ks_sa_rng_init causada por la falta de inicializaci\u00f3n del puntero del reloj. La llamada a clk_get_rate() se realiza sobre un puntero clk no inicializado, resultando en una divisi\u00f3n por cero al calcular los valores de retardo.\n\nA\u00f1ade c\u00f3digo de inicializaci\u00f3n del reloj antes de usar el reloj.\n\n drivers/char/hw_random/ks-sa-rng.c | 7 +++++++\n 1 archivo modificado, 7 inserciones(+)"
          }
        ],
        "id": "CVE-2025-40127",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {},
        "published": "2025-11-12T11:15:42.290",
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        "vulnStatus": "Deferred"
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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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