{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "67814c00de3161181cddd06c77aeaf86ac4cc584"
            },
            {
              "fixed": "1344b632cb5043e32939a84568125719111c5af3"
            },
            {
              "fixed": "2a5cfcad1d56e26d645b7887b0ed24c371851525"
            },
            {
              "fixed": "5bd63cad9df4328a184c409fbdad4f17944bcdb8"
            },
            {
              "fixed": "3e8ec7c0387273329374f5c7bd61f5f38af71fe1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74590.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfsverity: Fix bpf_get_fsverity_digest() dynptr assumptions\n\nThe BPF verifier and the dynptr abstraction ensure that the memory space\nreferenced by a dynptr remains valid.  They do not, however, provide any\nguarantee that the contents of the memory are stable.  kfuncs are\nexpected to remain memory-safe even if concurrent modifications occur.\n\nbpf_get_fsverity_digest() didn't follow that: it could crash if\narg-\u003edigest_size was concurrently modified.\n\nFix that by using the known-good value hash_alg-\u003edigest_size instead.\n\nAlso widen 'dynptr_sz' and 'out_digest_sz' to u64 to match the return\ntype of __bpf_dynptr_size().  It doesn't appear that it can actually be\nmore than INT_MAX currently (since __bpf_dynptr_data_rw() excludes\nfile-based pointers), but the correct type might as well be used.",
  "id": "CVE-2026-74590",
  "modified": "2026-08-27T11:30:33.204874177Z",
  "published": "2026-08-22T15:31:41.929Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1344b632cb5043e32939a84568125719111c5af3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a5cfcad1d56e26d645b7887b0ed24c371851525"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e8ec7c0387273329374f5c7bd61f5f38af71fe1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bd63cad9df4328a184c409fbdad4f17944bcdb8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74590.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74590"
    },
    {
      "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:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions"
}