Vulnerability-Lookup

GHSA-593C-JFQG-MJGP

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle

dma_free_coherent() in error path takes priv->rx_buf.alloc_len as the dma handle. This would lead to improper unmapping of the buffer.

Change the dma handle to priv->rx_buf.alloc_phys.

Severity

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43283"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:49Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ec_bhf: Fix dma_free_coherent() dma handle\n\ndma_free_coherent() in error path takes priv-\u003erx_buf.alloc_len as\nthe dma handle. This would lead to improper unmapping of the buffer.\n\nChange the dma handle to priv-\u003erx_buf.alloc_phys.",
  "id": "GHSA-593c-jfqg-mjgp",
  "modified": "2026-05-08T15:31:19Z",
  "published": "2026-05-06T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f589ee54fd6d76d3f75e745f7f12c64cbd749e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b1371cd4032ae859838ebc74215f569987bb197"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b1d3c5d58a80a19d017a409aa2308162bab5bbf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e300c33ef3cc544c2b9c693778fe9490cfe9184"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e54ff938bebb173822b4c38b33fc164c1cabf92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8320727be7ff704e07c87624efc2a4a75f54b3ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43283 (GCVE-0-2026-43283)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:29 – Updated: 2026-08-05 12:27

Title

net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle

Summary

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle dma_free_coherent() in error path takes priv->rx_buf.alloc_len as the dma handle. This would lead to improper unmapping of the buffer. Change the dma handle to priv->rx_buf.alloc_phys.

Severity

8.8 (High)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0f589ee54fd6d76d3…
https://git.kernel.org/stable/c/accd0599bc8e73b96…
https://git.kernel.org/stable/c/8320727be7ff704e0…
https://git.kernel.org/stable/c/1e300c33ef3cc544c…
https://git.kernel.org/stable/c/1b1371cd4032ae859…
https://git.kernel.org/stable/c/1b1d3c5d58a80a19d…
https://git.kernel.org/stable/c/7e54ff938bebb1738…
https://git.kernel.org/stable/c/ffe68c3766997d82e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 0f589ee54fd6d76d3f75e745f7f12c64cbd749e5 (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0 (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 8320727be7ff704e07c87624efc2a4a75f54b3ce (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 1e300c33ef3cc544c2b9c693778fe9490cfe9184 (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 1b1371cd4032ae859838ebc74215f569987bb197 (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 1b1d3c5d58a80a19d017a409aa2308162bab5bbf (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < 7e54ff938bebb173822b4c38b33fc164c1cabf92 (git) Affected: 6af55ff52b02d492d45db88df3e461fa51a6f753 , < ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2 (git)
Linux	Linux	Affected: 3.15 Unaffected: 0 , < 3.15 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ec_bhf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f589ee54fd6d76d3f75e745f7f12c64cbd749e5",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "8320727be7ff704e07c87624efc2a4a75f54b3ce",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "1e300c33ef3cc544c2b9c693778fe9490cfe9184",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "1b1371cd4032ae859838ebc74215f569987bb197",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "1b1d3c5d58a80a19d017a409aa2308162bab5bbf",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
              "lessThan": "7e54ff938bebb173822b4c38b33fc164c1cabf92",
              "status": "affected",
              "version": "6af55ff52b02d492d45db88df3e461fa51a6f753",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.15"
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            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.252",
                  "versionStartIncluding": "3.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "3.15",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "3.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "3.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "3.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ec_bhf: Fix dma_free_coherent() dma handle\n\ndma_free_coherent() in error path takes priv-\u003erx_buf.alloc_len as\nthe dma handle. This would lead to improper unmapping of the buffer.\n\nChange the dma handle to priv-\u003erx_buf.alloc_phys."
        }
      ],
      "metrics": [
        {
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            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached by local netdevice administration via RTM_SETLINK or SIOCSIFFLAGS setting IFF_UP, which calls ec_bhf_open(). Received EtherCAT packets do not directly reach the bad dma_free_coherent() error path.\nAC:L - An attacker who can administer the netdev can repeatedly attempt link-up under memory pressure until TX coherent allocation fails after RX allocation succeeds. No race or external timing condition is required.\nPR:L - The path requires CAP_NET_ADMIN in the owning network namespace, and this physical netdev is movable because the driver does not mark it netns_immutable. In a reasonable delegated/container netns deployment, namespace admin privileges are sufficient.\nUI:N - No separate victim interaction is needed once the attacker has access to the local netlink/ioctl control path. The attacker can trigger the open error path directly with link-up attempts.\nS:C - The wrong DMA handle can leave a stale DMA/IOMMU mapping or free the wrong physical pages, allowing device DMA beyond the intended lifetime of the RX buffer. This crosses the intended DMA isolation boundary.\nC:H - Stale DMA access or freeing the wrong in-use pages can expose reused kernel memory through memory corruption. As a DMA lifetime/memory corruption issue, high confidentiality impact is defensible.\nI:H - The bug can let the device write received data into freed or incorrectly freed kernel memory, creating a kernel memory corruption primitive. Such corruption is potentially usable for arbitrary kernel memory modification or code execution.\nA:H - Passing an invalid DMA handle to dma_free_coherent() can corrupt allocator/IOMMU state or free the wrong pages. At minimum this can cause kernel warnings, oopses, or panics."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:27:03.376Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/0f589ee54fd6d76d3f75e745f7f12c64cbd749e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0"
        },
        {
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          "url": "https://git.kernel.org/stable/c/1b1371cd4032ae859838ebc74215f569987bb197"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b1d3c5d58a80a19d017a409aa2308162bab5bbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e54ff938bebb173822b4c38b33fc164c1cabf92"
        },
        {
          "url": "https://git.kernel.org/stable/c/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2"
        }
      ],
      "title": "net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43283",
    "datePublished": "2026-05-06T11:29:03.726Z",
    "dateReserved": "2026-05-01T14:12:55.998Z",
    "dateUpdated": "2026-08-05T12:27:03.376Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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GHSA-593C-JFQG-MJGP

CVE-2026-43283 (GCVE-0-2026-43283)

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