CVE-2026-43092 (GCVE-0-2026-43092)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-06 07:40
VLAI?
Title
xsk: validate MTU against usable frame size on bind
Summary
In the Linux kernel, the following vulnerability has been resolved: xsk: validate MTU against usable frame size on bind AF_XDP bind currently accepts zero-copy pool configurations without verifying that the device MTU fits into the usable frame space provided by the UMEM chunk. This becomes a problem since we started to respect tailroom which is subtracted from chunk_size (among with headroom). 2k chunk size might not provide enough space for standard 1500 MTU, so let us catch such settings at bind time. Furthermore, validate whether underlying HW will be able to satisfy configured MTU wrt XSK's frame size multiplied by supported Rx buffer chain length (that is exposed via net_device::xdp_zc_max_segs).
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 24ea50127ecf0efe819c1f6230add27abc6ca9d9 , < a55793e5a97d4e39bdb380873a9780fe0010bff6 (git)
Affected: 24ea50127ecf0efe819c1f6230add27abc6ca9d9 , < f669d60db11dbabb96279f2b20f9d1cba43cddb2 (git)
Affected: 24ea50127ecf0efe819c1f6230add27abc6ca9d9 , < 25e1e91a8da819924df0b16e3812d7b24c8ce133 (git)
Affected: 24ea50127ecf0efe819c1f6230add27abc6ca9d9 , < b2f4daa6422fd6cc0cec969794dab4a88ea4cea1 (git)
Affected: 24ea50127ecf0efe819c1f6230add27abc6ca9d9 , < 36ee60b569ba0dfb6f961333b90d19ab5b323fa9 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk_buff_pool.c"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate MTU against usable frame size on bind\n\nAF_XDP bind currently accepts zero-copy pool configurations without\nverifying that the device MTU fits into the usable frame space provided\nby the UMEM chunk.\n\nThis becomes a problem since we started to respect tailroom which is\nsubtracted from chunk_size (among with headroom). 2k chunk size might\nnot provide enough space for standard 1500 MTU, so let us catch such\nsettings at bind time. Furthermore, validate whether underlying HW will\nbe able to satisfy configured MTU wrt XSK\u0027s frame size multiplied by\nsupported Rx buffer chain length (that is exposed via\nnet_device::xdp_zc_max_segs)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T07:40:24.619Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
        {
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      ],
      "title": "xsk: validate MTU against usable frame size on bind",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43092",
    "datePublished": "2026-05-06T07:40:24.619Z",
    "dateReserved": "2026-05-01T14:12:55.984Z",
    "dateUpdated": "2026-05-06T07:40:24.619Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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