{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02"
            },
            {
              "fixed": "5f123bc278bf4e3283d8606321bebbfd299f4384"
            },
            {
              "fixed": "1a6051cd7e3e4c54ff3854a43b638b9292af5e67"
            },
            {
              "fixed": "8769708add9eadeea8041a9761771bb715a87104"
            },
            {
              "fixed": "a03975beb9f6af0d8ac051e30b2abeabe618414f"
            },
            {
              "fixed": "0ec4d3f6e6934deb843b561ae048cd17218e5ad1"
            },
            {
              "fixed": "9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12"
            },
            {
              "fixed": "6523bc1b40e69301f24c14338b762af4739d6d39"
            },
            {
              "fixed": "a315e022a72d95ef5f1d4e58e903cb492b0ad931"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee"
            },
            {
              "last_affected": "25c9cdef57488578da21d99eb614b97ffcf6e59f"
            },
            {
              "last_affected": "98d3c852e63b49129515dd18c875999efaf8530a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.19.118"
            },
            {
              "fixed": "4.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.35"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.6.7"
            },
            {
              "fixed": "5.7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.7.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43093.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront.",
  "id": "CVE-2026-43093",
  "modified": "2026-07-08T05:37:09.543263836Z",
  "published": "2026-05-06T07:40:25.266Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43093.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43093"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xsk: tighten UMEM headroom validation to account for tailroom and min frame"
}