CVE-2026-53088 (GCVE-0-2026-53088)
Vulnerability from cvelistv5
Published
2026-06-24 16:30
Modified
2026-08-05 12:33
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: fix off-by-one in bcmgenet_put_txcb The write_ptr points to the next open tx_cb. We want to return the tx_cb that gets rewinded, so we must rewind the pointer first then return the tx_cb that it points to. That way the txcb can be correctly cleaned up.
References
Impacted products
Vendor Product Version
Linux Linux Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 876dbadd53a7102e2a84afc84ea2bd3ee6dc5636
Version: 3bdf77194ea822390b405639b77659071fd2c2e9
Version: 3.16.50   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.258",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.1",
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                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "3.16.50",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb\n\nThe write_ptr points to the next open tx_cb. We want to return the\ntx_cb that gets rewinded, so we must rewind the pointer first then\nreturn the tx_cb that it points to. That way the txcb can be correctly\ncleaned up."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable path is the bcmgenet Ethernet transmit path, reachable when a network-facing embedded/router system sends replies or forwards attacker-supplied traffic through the affected interface.\nAC:L - The off-by-one cleanup is deterministic once the transmit error/reclaim path is reached, and an attacker can repeatedly drive transmit activity and resource pressure without needing to win an uncontrolled race.\nPR:N - No authentication or local account is required in the highest-impact network-facing deployment, because unauthenticated network traffic can cause packets to be transmitted through the driver.\nUI:N - Exploitation does not require a victim user to open a file, mount media, or perform any other interactive action.\nS:U - The impact remains within the kernel and the affected host\u0027s networking/DMA resources, without crossing a separate security authority such as a VM boundary.\nC:H - The wrong transmit control block can leave stale skb/DMA metadata and later operate on dangling kernel objects, making kernel memory disclosure a defensible worst-case outcome.\nI:H - The stale control-block cleanup can plausibly become double-free or use-after-free style kernel heap corruption, which is treated as high integrity impact.\nA:H - Even without full exploitation, incorrect cleanup of transmit control blocks and DMA mappings can corrupt driver state, leak resources, or crash/hang networking/kernel execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:33:16.590Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/14e9f86564fff7bcf7f45c1b69080e837b31d185"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de"
        },
        {
          "url": "https://git.kernel.org/stable/c/85f34ec320d3881badfd4edc5fee5cd5012bb54d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a74590170427a3ca7cc4bb8690cdd559129c29c"
        },
        {
          "url": "https://git.kernel.org/stable/c/29394f722f620281f2ee9a47f947734e53d72c90"
        },
        {
          "url": "https://git.kernel.org/stable/c/4cab761fc51c65aef741fcece4a18f3554edbc09"
        },
        {
          "url": "https://git.kernel.org/stable/c/72df896e31ddd06fcc5a789f025ad7a62a18bc9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38"
        }
      ],
      "title": "net: bcmgenet: fix off-by-one in bcmgenet_put_txcb",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53088",
    "datePublished": "2026-06-24T16:30:27.655Z",
    "dateReserved": "2026-06-09T07:44:35.384Z",
    "dateUpdated": "2026-08-05T12:33:16.590Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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