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CVE-2026-98384

Estado: RecibidaSin puntuar—

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:

bpf: Corrección de lectura fuera de límites de sk_protocol en bpf_sock_destroy()

sk_protocol reside en struct sock, no en struct sock_common. Un sock de timewait o request entregado a bpf_sock_destroy() por el iterador tcp no es ninguno de ellos, por lo que leer sk->sk_protocol va más allá del objeto:

Solo se comprueba sk_protocol en socks completos. tcp_abort() ya sabe cómo tratar socks TIME_WAIT y NEW_SYN_RECV. También se corrige el comentario, nunca coincidió con el código.

Detalles técnicos trazas, registros y código del informe original
==================================================================
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:
 <TASK>
 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

Traducción automática del texto original de NVD (en inglés).

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-98384",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b",
              "lessThan": "5b4eb82475ae17d55974235c09e97044829426a8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b",
              "lessThan": "a9651704c6fd64590b5ad4fbe7c3768accf95993",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b",
              "lessThan": "91a482a81eabddebf5430cbbdf12027e1a91b767",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b",
              "lessThan": "2534a5e5d360c2b10203cfa80f4ab9d021e48f2f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ddbcb886268af8d12a23e6640b39d1d9c652b1b",
              "lessThan": "01b245ba016d44861690594e10f67e026ce8552f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/core/filter.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/core/filter.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-09T08:16:56.940",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/01b245ba016d44861690594e10f67e026ce8552f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2534a5e5d360c2b10203cfa80f4ab9d021e48f2f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5b4eb82475ae17d55974235c09e97044829426a8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/91a482a81eabddebf5430cbbdf12027e1a91b767",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a9651704c6fd64590b5ad4fbe7c3768accf95993",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destroy()\n\nsk_protocol lives in struct sock, not in struct sock_common. A timewait\nor request sock handed to bpf_sock_destroy() by the tcp iterator is\nneither, so reading sk->sk_protocol runs past the object:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in bpf_sock_destroy+0xc7/0xe0\nRead of size 2 at addr ffff8881047d11b4 by task test_progs/428\n\nTainted: [W]=WARN\nCall Trace:\n <TASK>\n dump_stack_lvl+0x91/0xf0\n print_report+0xd1/0x630\n kasan_report+0xf3/0x130\n __asan_report_load2_noabort+0x14/0x30\n bpf_sock_destroy+0xc7/0xe0\n bpf_prog_c3dd61f9d9cd9f37_iter_tcp6_timewait+0x9f/0xb7\n bpf_iter_run_prog+0x538/0xde0\n bpf_iter_tcp_seq_show+0x26b/0x4b0\n bpf_seq_read+0x424/0x1210\n vfs_read+0x197/0xe40\n ksys_read+0x119/0x240\n __x64_sys_read+0x72/0xc0\n x64_sys_call+0x647/0x27e0\n do_syscall_64+0xe5/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nOnly check sk_protocol on full socks. tcp_abort() already knows how to\ndeal with TIME_WAIT and NEW_SYN_RECV socks. Also fix the comment, it\nnever matched the code."
    }
  ],
  "lastModified": "2026-10-09T08:16:56.940",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}