{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  tcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)  do_tcp_getsockopt() reads icsk-\u003eicsk_ca_ops and dereferences the get_info function pointer without rcu_read_lock(). With BPF struct_ops congestion control, ca_ops can point to dynamically allocated memory that is freed concurrently, resulting in a use-after-free when the kernel dereferences or calls through the stale pointer.    BUG: KASAN: slab-use-after-free in do_tcp_getsockopt+0x2037/0x23e0   Read of size 8 at addr ffff888013701258 by task exploit/149    do_tcp_getsockopt+0x2037/0x23e0 (net/ipv4/tcp.c:4564)    tcp_getsockopt+0x91/0xf0    __sys_getsockopt+0xf7/0x170  Fix this by wrapping the ca_ops load and get_info call within rcu_read_lock()/rcu_read_unlock(), and using READ_ONCE() to load the icsk_ca_ops pointer.",
  "id": "DEBIAN-CVE-2026-99138",
  "modified": "2026-10-29T05:47:22.752482901Z",
  "published": "2026-10-28T11:17:33.740Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-99138"
    }
  ],
  "upstream": [
    "CVE-2026-99138"
  ]
}