Vulnerability-Lookup

FKIE_CVE-2025-38696

Vulnerability from fkie_nvd - Published: 2025-09-04 16:15 - Updated: 2026-10-19 21:10

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: MIPS: Don't crash in stack_top() for tasks without ABI or vDSO Not all tasks have an ABI associated or vDSO mapped, for example kthreads never do. If such a task ever ends up calling stack_top(), it will derefence the NULL ABI pointer and crash. This can for example happen when using kunit: mips_stack_top+0x28/0xc0 arch_pick_mmap_layout+0x190/0x220 kunit_vm_mmap_init+0xf8/0x138 __kunit_add_resource+0x40/0xa8 kunit_vm_mmap+0x88/0xd8 usercopy_test_init+0xb8/0x240 kunit_try_run_case+0x5c/0x1a8 kunit_generic_run_threadfn_adapter+0x28/0x50 kthread+0x118/0x240 ret_from_kernel_thread+0x14/0x1c Only dereference the ABI point if it is set. The GIC page is also included as it is specific to the vDSO. Also move the randomization adjustment into the same conditional.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/24d098b6f69b0aa806ffcb3e18259bee31650b28	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5b6839b572b503609b9b58bc6c04a816eefa0794	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/82d140f6aab5e89a9d3972697a0dbe1498752d9b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ab18e48a503230d675e824a0d68a108bdff42503	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bd90dbd196831f5c2620736dc221db2634cf1e8e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cddf47d20b0325dc8a4e57b833fe96e8f36c42a4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e78033e59444d257d095b73ce5d20625294f6ec2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e9f4a6b3421e936c3ee9d74710243897d74dbaa2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f22de2027b206ddfb8a075800bb5d0dacf2da4b8	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Mailing List, Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-032379.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	4.19
linux	linux_kernel	4.19
debian	debian_linux	11.0

JSON

To clipboard

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    },
    {
      "affectedData": [
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          "product": "SIMATIC CN 4100",
          "vendor": "Siemens",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: Don\u0027t crash in stack_top() for tasks without ABI or vDSO\n\nNot all tasks have an ABI associated or vDSO mapped,\nfor example kthreads never do.\nIf such a task ever ends up calling stack_top(), it will derefence the\nNULL ABI pointer and crash.\n\nThis can for example happen when using kunit:\n\n    mips_stack_top+0x28/0xc0\n    arch_pick_mmap_layout+0x190/0x220\n    kunit_vm_mmap_init+0xf8/0x138\n    __kunit_add_resource+0x40/0xa8\n    kunit_vm_mmap+0x88/0xd8\n    usercopy_test_init+0xb8/0x240\n    kunit_try_run_case+0x5c/0x1a8\n    kunit_generic_run_threadfn_adapter+0x28/0x50\n    kthread+0x118/0x240\n    ret_from_kernel_thread+0x14/0x1c\n\nOnly dereference the ABI point if it is set.\n\nThe GIC page is also included as it is specific to the vDSO.\nAlso move the randomization adjustment into the same conditional."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nMIPS: No fallar en stack_top() para tareas sin ABI o vDSO\n\nNo todas las tareas tienen un ABI asociado o vDSO mapeado,\npor ejemplo, los kthreads nunca lo hacen.\nSi una tarea de este tipo alguna vez termina llamando a stack_top(), desreferenciar\u00e1 el puntero ABI NULL y fallar\u00e1.\n\nEsto puede ocurrir, por ejemplo, al usar kunit:\n\n    mips_stack_top+0x28/0xc0\n    arch_pick_mmap_layout+0x190/0x220\n    kunit_vm_mmap_init+0xf8/0x138\n    __kunit_add_resource+0x40/0xa8\n    kunit_vm_mmap+0x88/0xd8\n    usercopy_test_init+0xb8/0x240\n    kunit_try_run_case+0x5c/0x1a8\n    kunit_generic_run_threadfn_adapter+0x28/0x50\n    kthread+0x118/0x240\n    ret_from_kernel_thread+0x14/0x1c\n\nSolo desreferenciar el puntero ABI si est\u00e1 establecido.\n\nLa p\u00e1gina GIC tambi\u00e9n se incluye ya que es espec\u00edfica del vDSO.\nTambi\u00e9n mover el ajuste de aleatorizaci\u00f3n a la misma condicional."
    }
  ],
  "id": "CVE-2025-38696",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-09-04T16:15:38.060",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/24d098b6f69b0aa806ffcb3e18259bee31650b28"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/82d140f6aab5e89a9d3972697a0dbe1498752d9b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ab18e48a503230d675e824a0d68a108bdff42503"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bd90dbd196831f5c2620736dc221db2634cf1e8e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cddf47d20b0325dc8a4e57b833fe96e8f36c42a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/e78033e59444d257d095b73ce5d20625294f6ec2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e9f4a6b3421e936c3ee9d74710243897d74dbaa2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f22de2027b206ddfb8a075800bb5d0dacf2da4b8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-38696 (GCVE-0-2025-38696)

Vulnerability from cvelistv5 – Published: 2025-09-04 15:32 – Updated: 2026-05-23 16:00

Title

MIPS: Don't crash in stack_top() for tasks without ABI or vDSO

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6971 records in the last 180 days details

References

11 references

URL	Tags
https://git.kernel.org/stable/c/ab18e48a503230d67…
https://git.kernel.org/stable/c/e78033e59444d257d…
https://git.kernel.org/stable/c/bd90dbd196831f5c2…
https://git.kernel.org/stable/c/5b6839b572b503609…
https://git.kernel.org/stable/c/f22de2027b206ddfb…
https://git.kernel.org/stable/c/82d140f6aab5e89a9…
https://git.kernel.org/stable/c/24d098b6f69b0aa80…
https://git.kernel.org/stable/c/cddf47d20b0325dc8…
https://git.kernel.org/stable/c/e9f4a6b3421e936c3…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < ab18e48a503230d675e824a0d68a108bdff42503 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < e78033e59444d257d095b73ce5d20625294f6ec2 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < bd90dbd196831f5c2620736dc221db2634cf1e8e (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < 5b6839b572b503609b9b58bc6c04a816eefa0794 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < f22de2027b206ddfb8a075800bb5d0dacf2da4b8 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < 82d140f6aab5e89a9d3972697a0dbe1498752d9b (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < 24d098b6f69b0aa806ffcb3e18259bee31650b28 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < cddf47d20b0325dc8a4e57b833fe96e8f36c42a4 (git) Affected: ea7e0480a4b695d0aa6b3fa99bd658a003122113 , < e9f4a6b3421e936c3ee9d74710243897d74dbaa2 (git) Affected: 86717a97f9218de798c6d33e0014ab9325e18f56 (git) Affected: e4882348eaa9f5f052cb21d2a5aa99a063e4308b (git) Affected: 4.14.77 , < 4.15 (semver) Affected: 4.18.15 , < 4.19 (semver)
Linux	Linux	Affected: 4.19 Unaffected: 0 , < 4.19 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.149 , ≤ 6.1.* (semver) Unaffected: 6.6.103 , ≤ 6.6.* (semver) Unaffected: 6.12.43 , ≤ 6.12.* (semver) Unaffected: 6.15.11 , ≤ 6.15.* (semver) Unaffected: 6.16.2 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC CN 4100	Affected: 0 , < V5.0 (custom)

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          "dateUpdated": "2025-11-03T17:41:23.900Z",
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        "references": [
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        "title": "CVE Program Container"
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        "providerMetadata": {
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Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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