tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context

{
  "id": "d6c7b72b2cd3215ed629c406e1e70cd4acf31bceac0f37ba22df1f8426f59264",
  "url": "https://osv.dev/vulnerability/CVE-2026-98646",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context bpf_sock_destroy() runs from the tcp iterator, under rcu_read_lock(). If the sock is a listener that still has children in its accept queue, tcp_abort() ends up in inet_csk_listen_stop() and the cond_resched() there trips the debug check: BUG: sleeping function called from invalid context at net/ipv4/inet_connection_sock.c:1523 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 628, name: test_progs preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 locks held by test_progs/628: 3, last CPU#3: #0: ffff8881158cee18 (&p->lock){+.+.}-{4:4}, at: bpf_seq_read+0x56/0x1210 #1: ffff8881106bb858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: bpf_iter_tcp_seq_show+0x32b/0x4b0 #2: ffffffffb435af20 (rcu_read_lock){....}-{1:3}, at: bpf_iter_run_prog+0x46b/0xde0 CPU: 3 UID: 0 PID: 628 Comm: test_progs Tainted: G W 7.2.0+ #65 PREEMPT Tainted: [W]=WARN Call Trace: dump_stack_lvl+0xc1/0xf0 dump_stack+0x10/0x20 __might_resched+0x3d2/0x610 inet_csk_listen_stop+0x7b/0xbf0 tcp_abort+0x23b/0x3b0 bpf_sock_destroy+0xfc/0x140 bpf_prog_448133d24601754f_iter_tcp6_server+0x81/0x8a bpf_iter_run_prog+0x538/0xde0 bpf_iter_tcp_seq_show+0x26b/0x4b0 bpf_seq_read+0x424/0x1210 vfs_read+0x197/0xe40 ksys_read+0x119/0x240 __x64_sys_read+0x72/0xc0 x64_sys_call+0x647/0x27e0 do_syscall_64+0xe5/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fad39b28aca RSP: 002b:00007",
    "evidence": "osv:CVE-2026-98646",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.158",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.112",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98646",
      "aliases": [
        "CVE-2026-98646"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b"
                },
                {
                  "fixed": "23da88d1597ee7fdda373e1530284b763710911f"
                },
                {
                  "fixed": "5b52417c6196e05618a3b5d9753dbed9adef0166"
                },
                {
                  "fixed": "55bbebf2829c3f47c5a48fc261740301d0f25f48"
                },
                {
                  "fixed": "ee7246bccb9da66076dd8094daa48bdc761d6b76"
                },
                {
                  "fixed": "eaab8cab451b9502ce224cd202550375b894a467"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98646.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.158"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.112"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.55"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98646.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.687742921Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/23da88d1597ee7fdda373e1530284b763710911f",
        "https://git.kernel.org/stable/c/55bbebf2829c3f47c5a48fc261740301d0f25f48",
        "https://git.kernel.org/stable/c/5b52417c6196e05618a3b5d9753dbed9adef0166",
        "https://git.kernel.org/stable/c/eaab8cab451b9502ce224cd202550375b894a467",
        "https://git.kernel.org/stable/c/ee7246bccb9da66076dd8094daa48bdc761d6b76",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98646.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98646",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98646.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98646",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505295,
  "published_at": "2026-10-18T15:20:17.49+00:00"
}