{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0bed9b5c523d577378b6f83eab5835fe30c27208"
            },
            {
              "fixed": "9d37aec9ffe4e743dabc3f84502e9723e17a30d4"
            },
            {
              "fixed": "75e82e8944ac1efe9fdb88bd2f14d9a031282bdf"
            },
            {
              "fixed": "0060ec912292a550198d8d18ac95b433c92a7091"
            },
            {
              "fixed": "5ecfcd5c05866f185357700b81b461dae4f5ebb2"
            },
            {
              "fixed": "937d61f86d377a3aa578adae7a3dfcecdddf9d89"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "29c65a277a64645af853e8c9a9b3dda0ddc421e0"
            },
            {
              "last_affected": "d2c7223497cf8228416c70e3f4238ddd6c5bdf3c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "3.4.50"
            },
            {
              "fixed": "3.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "3.9.7"
            },
            {
              "fixed": "3.10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68156.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: refresh auth-\u003eauthorizer_buf{,_len} after authorizer update\n\nceph_x_create_authorizer() caches au-\u003ebuf-\u003evec.iov_base and\nau-\u003ebuf-\u003evec.iov_len in struct ceph_auth_handshake.  These\ncached values are then used by the messenger connect code when\nsending the authorizer.\n\nceph_x_update_authorizer() can rebuild the authorizer when a newer\nservice ticket is available.  If the rebuilt authorizer no longer\nfits in the existing buffer, ceph_x_build_authorizer() drops its\nreference to au-\u003ebuf and allocates a new one.  If this is the final\nreference, ceph_buffer_put() frees the old ceph_buffer and its\nvec.iov_base, but auth-\u003eauthorizer_buf still points at that freed\nmemory.\n\nA subsequent msgr1 reconnect can therefore queue the stale pointer\nand trigger a KASAN slab-use-after-free in _copy_from_iter() while\ntcp_sendmsg() copies the authorizer.\n\nRefresh auth-\u003eauthorizer_buf and auth-\u003eauthorizer_buf_len after a\nsuccessful authorizer rebuild so the messenger sends the current\nbuffer.",
  "id": "CVE-2026-68156",
  "modified": "2026-08-12T03:51:25.058325305Z",
  "published": "2026-08-10T11:59:22.514Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0060ec912292a550198d8d18ac95b433c92a7091"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ecfcd5c05866f185357700b81b461dae4f5ebb2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75e82e8944ac1efe9fdb88bd2f14d9a031282bdf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/937d61f86d377a3aa578adae7a3dfcecdddf9d89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d37aec9ffe4e743dabc3f84502e9723e17a30d4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68156.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68156"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "libceph: refresh auth-\u003eauthorizer_buf{,_len} after authorizer update"
}