{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.187-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.101-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.101-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  libceph: refresh auth-\u003eauthorizer_buf{,_len} after authorizer update  ceph_x_create_authorizer() caches au-\u003ebuf-\u003evec.iov_base and au-\u003ebuf-\u003evec.iov_len in struct ceph_auth_handshake.  These cached values are then used by the messenger connect code when sending the authorizer.  ceph_x_update_authorizer() can rebuild the authorizer when a newer service ticket is available.  If the rebuilt authorizer no longer fits in the existing buffer, ceph_x_build_authorizer() drops its reference to au-\u003ebuf and allocates a new one.  If this is the final reference, ceph_buffer_put() frees the old ceph_buffer and its vec.iov_base, but auth-\u003eauthorizer_buf still points at that freed memory.  A subsequent msgr1 reconnect can therefore queue the stale pointer and trigger a KASAN slab-use-after-free in _copy_from_iter() while tcp_sendmsg() copies the authorizer.  Refresh auth-\u003eauthorizer_buf and auth-\u003eauthorizer_buf_len after a successful authorizer rebuild so the messenger sends the current buffer.",
  "id": "DEBIAN-CVE-2026-68156",
  "modified": "2026-09-14T16:47:28.196498476Z",
  "published": "2026-08-10T13:20:01.780Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-68156"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-68156"
  ]
}