CVE-2026-43092 (GCVE-0-2026-43092)
Vulnerability from cvelistv5
Published
2026-05-06 07:40
Modified
2026-05-11 22:17
Severity ?
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).
References
Impacted products
Vendor Product Version
Linux Linux Version: 24ea50127ecf0efe819c1f6230add27abc6ca9d9
Version: 24ea50127ecf0efe819c1f6230add27abc6ca9d9
Version: 24ea50127ecf0efe819c1f6230add27abc6ca9d9
Version: 24ea50127ecf0efe819c1f6230add27abc6ca9d9
Version: 24ea50127ecf0efe819c1f6230add27abc6ca9d9
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk_buff_pool.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a55793e5a97d4e39bdb380873a9780fe0010bff6",
              "status": "affected",
              "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
              "versionType": "git"
            },
            {
              "lessThan": "f669d60db11dbabb96279f2b20f9d1cba43cddb2",
              "status": "affected",
              "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
              "versionType": "git"
            },
            {
              "lessThan": "25e1e91a8da819924df0b16e3812d7b24c8ce133",
              "status": "affected",
              "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
              "versionType": "git"
            },
            {
              "lessThan": "b2f4daa6422fd6cc0cec969794dab4a88ea4cea1",
              "status": "affected",
              "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
              "versionType": "git"
            },
            {
              "lessThan": "36ee60b569ba0dfb6f961333b90d19ab5b323fa9",
              "status": "affected",
              "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk_buff_pool.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "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": "6.6.136",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.83",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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": "2026-05-11T22:17:34.476Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2"
        },
        {
          "url": "https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1"
        },
        {
          "url": "https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9"
        }
      ],
      "title": "xsk: validate MTU against usable frame size on bind",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "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": "2026-05-11T22:17:34.476Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.