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CVE-2025-40278

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak

Fix a KMSAN kernel-infoleak detected by the syzbot .

[net?] KMSAN: kernel-infoleak in __skb_datagram_iter

In tcf_ife_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace.

Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.

Leer descripción completaMostrar menos

This change silences the KMSAN report and prevents potential information leaks from the kernel memory.

This fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures no infoleak.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40278",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "vendor": "Linux",
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              "lessThan": "918e063304f945fb93be9bb70cacea07d0b730ea",
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            },
            {
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              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
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          ],
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    },
    {
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      "affectedData": [
        {
          "vendor": "Siemens",
          "product": "RUGGEDCOM RST2428P",
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  "published": "2025-12-06T22:15:55.700",
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      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak\n\nFix a KMSAN kernel-infoleak detected  by the syzbot .\n\n[net?] KMSAN: kernel-infoleak in __skb_datagram_iter\n\nIn tcf_ife_dump(), the variable 'opt' was partially initialized using a\ndesignatied initializer. While the padding bytes are reamined\nuninitialized. nla_put() copies the entire structure into a\nnetlink message, these uninitialized bytes leaked to userspace.\n\nInitialize the structure with memset before assigning its fields\nto ensure all members and padding are cleared prior to beign copied.\n\nThis change silences the KMSAN report and prevents potential information\nleaks from the kernel memory.\n\nThis fix has been tested and validated by syzbot. This patch closes the\nbug reported at the following syzkaller link and ensures no infoleak."
    }
  ],
  "lastModified": "2026-06-17T09:21:34.933",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}