Vulnerability-Lookup

FKIE_CVE-2025-38095

Vulnerability from fkie_nvd - Published: 2025-07-03 08:15 - Updated: 2026-07-30 06:22

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: dma-buf: insert memory barrier before updating num_fences smp_store_mb() inserts memory barrier after storing operation. It is different with what the comment is originally aiming so Null pointer dereference can be happened if memory update is reordered.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/08680c4dadc6e736c75bc2409d833f03f9003c51	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3becc659f9cb76b481ad1fb71f54d5c8d6332d3f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/72c7d62583ebce7baeb61acce6057c361f73be4a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c9d2b9a80d06a58f37e0dc8c827075639b443927	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d0b7f11dd68b593bd970e5735be00e8d89bace30	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe1bebd0edb22e3536cbc920ec713331d1367ad4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Mailing List, Third Party Advisory

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	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
debian	debian_linux	11.0

JSON

To clipboard

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  "cveTags": [],
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf: insert memory barrier before updating num_fences\n\nsmp_store_mb() inserts memory barrier after storing operation.\nIt is different with what the comment is originally aiming so Null\npointer dereference can be happened if memory update is reordered."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dma-buf: inserta una barrera de memoria antes de actualizar num_fences. smp_store_mb() inserta una barrera de memoria despu\u00e9s de la operaci\u00f3n de almacenamiento. Esto difiere del objetivo original del comentario, por lo que puede producirse una desreferencia de puntero nulo si se reordena la actualizaci\u00f3n de memoria."
    }
  ],
  "id": "CVE-2025-38095",
  "lastModified": "2026-07-30T06:22:50.430",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "type": "Secondary"
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
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          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-07-03T08:15:26.300",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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  ]
}

CVE-2025-38095 (GCVE-0-2025-38095)

Vulnerability from cvelistv5 – Published: 2025-07-03 07:44 – Updated: 2026-08-05 11:59

Title

dma-buf: insert memory barrier before updating num_fences

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/90eb79c4ed98a4e24…
https://git.kernel.org/stable/c/d0b7f11dd68b593bd…
https://git.kernel.org/stable/c/3becc659f9cb76b48…
https://git.kernel.org/stable/c/c9d2b9a80d06a58f3…
https://git.kernel.org/stable/c/fe1bebd0edb22e353…
https://git.kernel.org/stable/c/08680c4dadc6e736c…
https://git.kernel.org/stable/c/72c7d62583ebce7ba…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < 90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < d0b7f11dd68b593bd970e5735be00e8d89bace30 (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < 3becc659f9cb76b481ad1fb71f54d5c8d6332d3f (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < c9d2b9a80d06a58f37e0dc8c827075639b443927 (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < fe1bebd0edb22e3536cbc920ec713331d1367ad4 (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < 08680c4dadc6e736c75bc2409d833f03f9003c51 (git) Affected: a590d0fdbaa56f482ff515e1040b6d9b1b200d63 , < 72c7d62583ebce7baeb61acce6057c361f73be4a (git)
Linux	Linux	Affected: 5.0 Unaffected: 0 , < 5.0 (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.192 , ≤ 5.15.* (semver) Unaffected: 6.1.140 , ≤ 6.1.* (semver) Unaffected: 6.6.92 , ≤ 6.6.* (semver) Unaffected: 6.12.30 , ≤ 6.12.* (semver) Unaffected: 6.14.8 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:58:27.686Z",
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          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
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        "title": "CVE Program Container"
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              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.192",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.140",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.92",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.30",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.8",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf: insert memory barrier before updating num_fences\n\nsmp_store_mb() inserts memory barrier after storing operation.\nIt is different with what the comment is originally aiming so Null\npointer dereference can be happened if memory update is reordered."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The race is driven entirely through local ioctls on a dma-buf or DRM render-node file descriptor (DMA_BUF_IOCTL_IMPORT_SYNC_FILE / EXPORT_SYNC_FILE / SYNC, and DRM_RENDER_ALLOW submit/wait/busy ioctls). No network or remote peer input reaches dma_resv_add_fence().\nAC:L - The attacker controls both sides of the race \u2014 one thread adds fences via DMA_BUF_IOCTL_IMPORT_SYNC_FILE while another iterates them locklessly via EXPORT_SYNC_FILE/SYNC \u2014 pinning threads to separate CPUs and looping indefinitely, and can groom the slab so the uninitialized slot holds a chosen value. The equivalent race was already demonstrated by the unprivileged igt/gem_busy/close-race testcase producing a GPF with slab poison, and affected weakly-ordered arm64 hardware is mainstream, not a rare configuration.\nPR:L - Only an unprivileged local user is needed: a dma-buf fd from /dev/dma_heap (accessible to every Android app) or a DRM render node (world/render-group accessible on desktops and containers with GPU passthrough), and all the relevant DRM ioctls are marked DRM_RENDER_ALLOW.\nUI:N - The attacker\u0027s own two threads perform both the fence addition and the lockless iteration on its own file descriptors. No victim action of any kind is required.\nS:U - The corruption occurs in kernel memory within the same security authority as the attacking process; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The reader dereferences an uninitialized/stale slab slot as a struct dma_fence *, giving reads at attacker-groomable addresses, and the bogus fence can be wrapped into a sync_file fd whose SYNC_IOC_FILE_INFO returns kernel-memory-derived strings and fields to userspace. Stale slots may also hold already-released fence pointers, a classic use-after-free read.\nI:H - kref_get_unless_zero() on the wild pointer performs an atomic increment at an attacker-influenced kernel address, and the subsequent dma_fence_is_signaled() makes an indirect call through fence-\u003eops-\u003esignaled \u2014 an attacker-controlled function pointer \u2014 providing both a write primitive and control-flow hijack potential.\nA:H - The documented manifestations are a NULL pointer dereference (per the commit message) and a general protection fault from dereferencing garbage heap data (per the Fixes: commit\u0027s oops log), both of which panic or oops the kernel. The race can be re-triggered in a loop for repeated denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:59:28.799Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0b7f11dd68b593bd970e5735be00e8d89bace30"
        },
        {
          "url": "https://git.kernel.org/stable/c/3becc659f9cb76b481ad1fb71f54d5c8d6332d3f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9d2b9a80d06a58f37e0dc8c827075639b443927"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe1bebd0edb22e3536cbc920ec713331d1367ad4"
        },
        {
          "url": "https://git.kernel.org/stable/c/08680c4dadc6e736c75bc2409d833f03f9003c51"
        },
        {
          "url": "https://git.kernel.org/stable/c/72c7d62583ebce7baeb61acce6057c361f73be4a"
        }
      ],
      "title": "dma-buf: insert memory barrier before updating num_fences",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38095",
    "datePublished": "2025-07-03T07:44:18.214Z",
    "dateReserved": "2025-04-16T04:51:23.984Z",
    "dateUpdated": "2026-08-05T11:59:28.799Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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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FKIE_CVE-2025-38095

CVE-2025-38095 (GCVE-0-2025-38095)

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Sightings

Nomenclature

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