{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db"
            },
            {
              "fixed": "e19c5ed9f1922a6854073f8651a63fa7be26e9e9"
            },
            {
              "fixed": "e0378419b0e20178b5d100b27c9cc7e51064202e"
            },
            {
              "fixed": "6086079e6d1c32ba4c4b422612b8aebb1129a96c"
            },
            {
              "fixed": "634a793d0e1c822412095d25a1338f8831ad894c"
            },
            {
              "fixed": "576afddfee8d1108ee299bf10f581593540d1a36"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "c602ad2b52dcbca5af08e5137bd5575c039b52e3"
            },
            {
              "last_affected": "ab68b940dd6f7b5f8e2557937162dcb8a0583a05"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.78"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.9.9"
            },
            {
              "fixed": "5.10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.10.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53076.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix OOB in pcpu_init_value\n\nAn out-of-bounds read occurs when copying element from a\nBPF_MAP_TYPE_CGROUP_STORAGE map to another pcpu map with the\nsame value_size that is not rounded up to 8 bytes.\n\nThe issue happens when:\n1. A CGROUP_STORAGE map is created with value_size not aligned to\n   8 bytes (e.g., 4 bytes)\n2. A pcpu map is created with the same value_size (e.g., 4 bytes)\n3. Update element in 2 with data in 1\n\npcpu_init_value assumes that all sources are rounded up to 8 bytes,\nand invokes copy_map_value_long to make a data copy, However, the\nassumption doesn't stand since there are some cases where the source\nmay not be rounded up to 8 bytes, e.g., CGROUP_STORAGE, skb-\u003edata.\nthe verifier verifies exactly the size that the source claims, not\nthe size rounded up to 8 bytes by kernel, an OOB happens when the\nsource has only 4 bytes while the copy size(4) is rounded up to 8.",
  "id": "CVE-2026-53076",
  "modified": "2026-08-12T03:51:15.911302839Z",
  "published": "2026-06-24T16:30:17.092Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/576afddfee8d1108ee299bf10f581593540d1a36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6086079e6d1c32ba4c4b422612b8aebb1129a96c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/634a793d0e1c822412095d25a1338f8831ad894c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0378419b0e20178b5d100b27c9cc7e51064202e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e19c5ed9f1922a6854073f8651a63fa7be26e9e9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53076.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53076"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bpf: Fix OOB in pcpu_init_value"
}