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CVE-2026-72344

Estado: RecibidaAlta (7.8)—

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

net/mlx5e: TC, skip peer flow cleanup when LAG seq is unavailable

mlx5_lag_get_dev_seq() will return error when the peer isn't in the LAG or when no device is marked as master. Result bad memory access and kernel crash[1].

Hence, skip the peer when lookup fails.

Note: In case there are peer flows, they are cleaned before LAG cleared the master mark.

Detalles técnicos trazas, registros y código del informe original
[1]
RIP: 0010:mlx5e_tc_del_fdb_peers_flow+0x3d/0x350 [mlx5_core]
Call Trace:
 <TASK>
 mlx5e_tc_clean_fdb_peer_flows+0xc1/0x130 [mlx5_core]
 mlx5_esw_offloads_unpair+0x3a/0x400 [mlx5_core]
 mlx5_esw_offloads_devcom_event+0xee/0x360 [mlx5_core]
 mlx5_devcom_send_event+0x7a/0x140 [mlx5_core]
 mlx5_esw_offloads_devcom_cleanup+0x2f/0x90 [mlx5_core]
 mlx5e_tc_esw_cleanup+0x28/0xf0 [mlx5_core]
 mlx5e_rep_tc_cleanup+0x19/0x30 [mlx5_core]
 mlx5e_cleanup_uplink_rep_tx+0x36/0x40 [mlx5_core]
 mlx5e_cleanup_rep_tx+0x55/0x60 [mlx5_core]
 mlx5e_detach_netdev+0x96/0xf0 [mlx5_core]
 mlx5e_netdev_change_profile+0x5b/0x120 [mlx5_core]
 mlx5e_netdev_attach_nic_profile+0x1b/0x30 [mlx5_core]
 mlx5e_vport_rep_unload+0xdd/0x110 [mlx5_core]
 __esw_offloads_unload_rep+0x81/0xb0 [mlx5_core]
 mlx5_eswitch_unregister_vport_reps+0x1d7/0x220 [mlx5_core]
 mlx5e_rep_remove+0x22/0x30 [mlx5_core]
 device_release_driver_internal+0x194/0x1f0
 bus_remove_device+0xe8/0x1b0
 device_del+0x159/0x3c0
 mlx5_rescan_drivers_locked+0xbc/0x2d0 [mlx5_core]
 mlx5_unregister_device+0x54/0x80 [mlx5_core]
 mlx5_uninit_one+0x73/0x130 [mlx5_core]
 remove_one+0x78/0xe0 [mlx5_core]
 pci_device_remove+0x39/0xa0

CVSS

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).

🎯 Técnicas ATT&CK

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

Acceso local (AV:L) sin interacción permite escalar privilegios mediante corrupción de memoria en el kernel de Linux (mlx5_core), causando DoS por bloqueo de aplicación.

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

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

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-2026-72344",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "971b28accc09436fe6a6d5afd667dcbfb3ed7e03",
              "lessThan": "5a95aa0198af75047d98fb72950642c89dab770f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "971b28accc09436fe6a6d5afd667dcbfb3ed7e03",
              "lessThan": "7bed4af0ced82948d660205efecd551ef8bc3912",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "7.1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:07.773",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5a95aa0198af75047d98fb72950642c89dab770f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7bed4af0ced82948d660205efecd551ef8bc3912",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: TC, skip peer flow cleanup when LAG seq is unavailable\n\nmlx5_lag_get_dev_seq() will return error when the peer isn't in the LAG\nor when no device is marked as master. Result bad memory access and kernel\ncrash[1].\n\nHence, skip the peer when lookup fails.\n\nNote: In case there are peer flows, they are cleaned before LAG cleared\nthe master mark.\n\n[1]\nRIP: 0010:mlx5e_tc_del_fdb_peers_flow+0x3d/0x350 [mlx5_core]\nCall Trace:\n <TASK>\n mlx5e_tc_clean_fdb_peer_flows+0xc1/0x130 [mlx5_core]\n mlx5_esw_offloads_unpair+0x3a/0x400 [mlx5_core]\n mlx5_esw_offloads_devcom_event+0xee/0x360 [mlx5_core]\n mlx5_devcom_send_event+0x7a/0x140 [mlx5_core]\n mlx5_esw_offloads_devcom_cleanup+0x2f/0x90 [mlx5_core]\n mlx5e_tc_esw_cleanup+0x28/0xf0 [mlx5_core]\n mlx5e_rep_tc_cleanup+0x19/0x30 [mlx5_core]\n mlx5e_cleanup_uplink_rep_tx+0x36/0x40 [mlx5_core]\n mlx5e_cleanup_rep_tx+0x55/0x60 [mlx5_core]\n mlx5e_detach_netdev+0x96/0xf0 [mlx5_core]\n mlx5e_netdev_change_profile+0x5b/0x120 [mlx5_core]\n mlx5e_netdev_attach_nic_profile+0x1b/0x30 [mlx5_core]\n mlx5e_vport_rep_unload+0xdd/0x110 [mlx5_core]\n __esw_offloads_unload_rep+0x81/0xb0 [mlx5_core]\n mlx5_eswitch_unregister_vport_reps+0x1d7/0x220 [mlx5_core]\n mlx5e_rep_remove+0x22/0x30 [mlx5_core]\n device_release_driver_internal+0x194/0x1f0\n bus_remove_device+0xe8/0x1b0\n device_del+0x159/0x3c0\n mlx5_rescan_drivers_locked+0xbc/0x2d0 [mlx5_core]\n mlx5_unregister_device+0x54/0x80 [mlx5_core]\n mlx5_uninit_one+0x73/0x130 [mlx5_core]\n remove_one+0x78/0xe0 [mlx5_core]\n pci_device_remove+0x39/0xa0"
    }
  ],
  "lastModified": "2026-08-17T06:18:38.317",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}