bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destroy()

{
  "id": "d0f58ad46eccf47035972325e2ed62c96691e88704137a567d0c829ef26f8862",
  "url": "https://osv.dev/vulnerability/CVE-2026-98384",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destroy()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destroy() sk_protocol lives in struct sock, not in struct sock_common. A timewait or request sock handed to bpf_sock_destroy() by the tcp iterator is neither, so reading sk->sk_protocol runs past the object: ================================================================== BUG: KASAN: slab-out-of-bounds in bpf_sock_destroy+0xc7/0xe0 Read of size 2 at addr ffff8881047d11b4 by task test_progs/428 Tainted: [W]=WARN Call Trace: dump_stack_lvl+0x91/0xf0 print_report+0xd1/0x630 kasan_report+0xf3/0x130 __asan_report_load2_noabort+0x14/0x30 bpf_sock_destroy+0xc7/0xe0 bpf_prog_c3dd61f9d9cd9f37_iter_tcp6_timewait+0x9f/0xb7 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 Only check sk_protocol on full socks. tcp_abort() already knows how to deal with TIME_WAIT and NEW_SYN_RECV socks. Also fix the comment, it never matched the code.",
    "evidence": "osv:CVE-2026-98384",
    "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-2026-98384",
      "aliases": [
        "CVE-2026-98384"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b"
                },
                {
                  "fixed": "5b4eb82475ae17d55974235c09e97044829426a8"
                },
                {
                  "fixed": "a9651704c6fd64590b5ad4fbe7c3768accf95993"
                },
                {
                  "fixed": "91a482a81eabddebf5430cbbdf12027e1a91b767"
                },
                {
                  "fixed": "2534a5e5d360c2b10203cfa80f4ab9d021e48f2f"
                },
                {
                  "fixed": "01b245ba016d44861690594e10f67e026ce8552f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98384.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.158"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
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                {
                  "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-2026-98384.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.198595713Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/01b245ba016d44861690594e10f67e026ce8552f",
        "https://git.kernel.org/stable/c/2534a5e5d360c2b10203cfa80f4ab9d021e48f2f",
        "https://git.kernel.org/stable/c/5b4eb82475ae17d55974235c09e97044829426a8",
        "https://git.kernel.org/stable/c/91a482a81eabddebf5430cbbdf12027e1a91b767",
        "https://git.kernel.org/stable/c/a9651704c6fd64590b5ad4fbe7c3768accf95993",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98384.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98384",
        "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-2026-98384.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98384",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517635,
  "published_at": "2026-10-09T07:34:23.097+00:00"
}