CVE-2026-43213

Estado: AnalizadaAlta (7.5)—

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw89: pci: validate sequence number of TX release report

Hardware rarely reports abnormal sequence number in TX release report, which will access out-of-bounds of wd_ring->pages array, causing NULL pointer dereference.

To prevent crash, validate rpp_info.seq before using.

Detalles técnicos trazas, registros y código del informe original

  BUG: kernel NULL pointer dereference, address: 0000000000000000
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 0 P4D 0
  Oops: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 1 PID: 1085 Comm: irq/129-rtw89_p Tainted: G S   U
             6.1.145-17510-g2f3369c91536 #1 (HASH:69e8 1)
  Call Trace:
   <IRQ>
   rtw89_pci_release_tx+0x18f/0x300 [rtw89_pci (HASH:4c83 2)]
   rtw89_pci_napi_poll+0xc2/0x190 [rtw89_pci (HASH:4c83 2)]
   net_rx_action+0xfc/0x460 net/core/dev.c:6578 net/core/dev.c:6645 net/core/dev.c:6759
   handle_softirqs+0xbe/0x290 kernel/softirq.c:601
   ? rtw89_pci_interrupt_threadfn+0xc5/0x350 [rtw89_pci (HASH:4c83 2)]
   __local_bh_enable_ip+0xeb/0x120 kernel/softirq.c:499 kernel/softirq.c:423
   </IRQ>
   <TASK>
   rtw89_pci_interrupt_threadfn+0xf8/0x350 [rtw89_pci (HASH:4c83 2)]
   ? irq_thread+0xa7/0x340 kernel/irq/manage.c:0
   irq_thread+0x177/0x340 kernel/irq/manage.c:1205 kernel/irq/manage.c:1314
   ? thaw_kernel_threads+0xb0/0xb0 kernel/irq/manage.c:1202
   ? irq_forced_thread_fn+0x80/0x80 kernel/irq/manage.c:1220
   kthread+0xea/0x110 kernel/kthread.c:376
   ? synchronize_irq+0x1a0/0x1a0 kernel/irq/manage.c:1287
   ? kthread_associate_blkcg+0x80/0x80 kernel/kthread.c:331
   ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
   </TASK>

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.33%
Percentil entre todas las CVEs puntuadas: 23
Fecha de la puntuación: 6/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement25 %
Impacto principalT1499.004 Application or System Exploitationimpact85 %

Vulnerabilidad de null pointer dereference (CWE-476) en controlador rtw89_pci del kernel Linux con acceso red adyacente (AV:A). El impacto es DoS por crash del kernel, no ejecución de código arbitrario ni escalada de privilegios.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Filter Network Traffic Disable or Remove Feature or Program

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-476

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-43213",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "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": "e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd",
              "lessThan": "ef7fa19809b2d892d45da53f90ac698d13c367fd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd",
              "lessThan": "b342dd13aedccb0dd27365f6cc63a262f42394ce",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd",
              "lessThan": "957eda596c7665f2966970fd1dcc35fe299b38e8",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/pci.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/pci.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-05-06T12:16:40.803",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/957eda596c7665f2966970fd1dcc35fe299b38e8",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b342dd13aedccb0dd27365f6cc63a262f42394ce",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ef7fa19809b2d892d45da53f90ac698d13c367fd",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: validate sequence number of TX release report\n\nHardware rarely reports abnormal sequence number in TX release report,\nwhich will access out-of-bounds of wd_ring->pages array, causing NULL\npointer dereference.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 1 PID: 1085 Comm: irq/129-rtw89_p Tainted: G S   U\n             6.1.145-17510-g2f3369c91536 #1 (HASH:69e8 1)\n  Call Trace:\n   <IRQ>\n   rtw89_pci_release_tx+0x18f/0x300 [rtw89_pci (HASH:4c83 2)]\n   rtw89_pci_napi_poll+0xc2/0x190 [rtw89_pci (HASH:4c83 2)]\n   net_rx_action+0xfc/0x460 net/core/dev.c:6578 net/core/dev.c:6645 net/core/dev.c:6759\n   handle_softirqs+0xbe/0x290 kernel/softirq.c:601\n   ? rtw89_pci_interrupt_threadfn+0xc5/0x350 [rtw89_pci (HASH:4c83 2)]\n   __local_bh_enable_ip+0xeb/0x120 kernel/softirq.c:499 kernel/softirq.c:423\n   </IRQ>\n   <TASK>\n   rtw89_pci_interrupt_threadfn+0xf8/0x350 [rtw89_pci (HASH:4c83 2)]\n   ? irq_thread+0xa7/0x340 kernel/irq/manage.c:0\n   irq_thread+0x177/0x340 kernel/irq/manage.c:1205 kernel/irq/manage.c:1314\n   ? thaw_kernel_threads+0xb0/0xb0 kernel/irq/manage.c:1202\n   ? irq_forced_thread_fn+0x80/0x80 kernel/irq/manage.c:1220\n   kthread+0xea/0x110 kernel/kthread.c:376\n   ? synchronize_irq+0x1a0/0x1a0 kernel/irq/manage.c:1287\n   ? kthread_associate_blkcg+0x80/0x80 kernel/kthread.c:331\n   ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n   </TASK>\n\nTo prevent crash, validate rpp_info.seq before using."
    }
  ],
  "lastModified": "2026-06-17T10:49:09.940",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "29ED84C1-BD97-40F4-B3BE-7ACD9AA05DC4",
              "versionEndExcluding": "6.18.16",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67",
              "versionEndExcluding": "6.19.6",
              "versionStartIncluding": "6.19"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}