{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "db1312dd95488b5e6ff362ff66fcf953a46b1821"
            },
            {
              "fixed": "447b668faa14710f611e714031e3739ac3ec3a4f"
            },
            {
              "fixed": "8f6363c8d54dde95982f0ab45e77cf57ec0efd62"
            },
            {
              "fixed": "dfcf013f77709ebdb282767edc2795a37cab5b57"
            },
            {
              "fixed": "b26189d28442183a8b5edb754f4a6918f77ca84e"
            },
            {
              "fixed": "2dcc9226203da7275a9c29d20007da278d73d5e9"
            },
            {
              "fixed": "1d6837d98bf966a041af65de5f78de7409ff83bc"
            },
            {
              "fixed": "3ddcfb013322aa37eaa7a0d344b73079c38dfa21"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.1.185"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.154"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.106"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80791.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: zero the AUTH_RECEIVE response buffer\n\nnvmet_execute_auth_receive() allocates the response buffer with kmalloc()\nsized by the host-supplied AUTH_RECEIVE allocation length, but the\nDH-HMAC-CHAP builders write only a fixed-size message into it. The full\nallocation length is then copied to the wire by nvmet_copy_to_sgl(), so a\nremote initiator receives the bytes past the built message -- up to nearly\na page of uninitialized slab -- during the pre-authentication handshake.\n\nAllocate the buffer with kzalloc() so the unwritten tail is zeroed before\nit is sent; conforming responses are unaffected.",
  "id": "CVE-2026-80791",
  "modified": "2026-09-06T03:31:04.207120499Z",
  "published": "2026-09-04T15:13:03.204Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80791.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80791"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nvmet-auth: zero the AUTH_RECEIVE response buffer"
}