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CVE-2023-53629

Estado: ModificadaAlta (7.8)—

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

fs: dlm: fix use after free in midcomms commit

While working on processing dlm message in softirq context I experienced the following KASAN use-after-free warning:

Detalles técnicos trazas, registros y código del informe original
[  151.760477] ==================================================================
[  151.761803] BUG: KASAN: use-after-free in dlm_midcomms_commit_mhandle+0x19d/0x4b0
[  151.763414] Read of size 4 at addr ffff88811a980c60 by task lock_torture/1347

[  151.765284] CPU: 7 PID: 1347 Comm: lock_torture Not tainted 6.1.0-rc4+ #2828
[  151.766778] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-3.module+el8.7.0+16134+e5908aa2 04/01/2014
[  151.768726] Call Trace:
[  151.769277]  <TASK>
[  151.769748]  dump_stack_lvl+0x5b/0x86
[  151.770556]  print_report+0x180/0x4c8
[  151.771378]  ? kasan_complete_mode_report_info+0x7c/0x1e0
[  151.772241]  ? dlm_midcomms_commit_mhandle+0x19d/0x4b0
[  151.773069]  kasan_report+0x93/0x1a0
[  151.773668]  ? dlm_midcomms_commit_mhandle+0x19d/0x4b0
[  151.774514]  __asan_load4+0x7e/0xa0
[  151.775089]  dlm_midcomms_commit_mhandle+0x19d/0x4b0
[  151.775890]  ? create_message.isra.29.constprop.64+0x57/0xc0
[  151.776770]  send_common+0x19f/0x1b0
[  151.777342]  ? remove_from_waiters+0x60/0x60
[  151.778017]  ? lock_downgrade+0x410/0x410
[  151.778648]  ? __this_cpu_preempt_check+0x13/0x20
[  151.779421]  ? rcu_lockdep_current_cpu_online+0x88/0xc0
[  151.780292]  _convert_lock+0x46/0x150
[  151.780893]  convert_lock+0x7b/0xc0
[  151.781459]  dlm_lock+0x3ac/0x580
[  151.781993]  ? 0xffffffffc0540000
[  151.782522]  ? torture_stop+0x120/0x120 [dlm_locktorture]
[  151.783379]  ? dlm_scan_rsbs+0xa70/0xa70
[  151.784003]  ? preempt_count_sub+0xd6/0x130
[  151.784661]  ? is_module_address+0x47/0x70
[  151.785309]  ? torture_stop+0x120/0x120 [dlm_locktorture]
[  151.786166]  ? 0xffffffffc0540000
[  151.786693]  ? lockdep_init_map_type+0xc3/0x360
[  151.787414]  ? 0xffffffffc0540000
[  151.787947]  torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]
[  151.789004]  ? torture_stop+0x120/0x120 [dlm_locktorture]
[  151.789858]  ? 0xffffffffc0540000
[  151.790392]  ? lock_torture_cleanup+0x20/0x20 [dlm_locktorture]
[  151.791347]  ? delay_tsc+0x94/0xc0
[  151.791898]  torture_ex_iter+0xc3/0xea [dlm_locktorture]
[  151.792735]  ? torture_start+0x30/0x30 [dlm_locktorture]
[  151.793606]  lock_torture+0x177/0x270 [dlm_locktorture]
[  151.794448]  ? torture_dlm_lock_sync.isra.3+0x150/0x150 [dlm_locktorture]
[  151.795539]  ? lock_torture_stats+0x80/0x80 [dlm_locktorture]
[  151.796476]  ? do_raw_spin_lock+0x11e/0x1e0
[  151.797152]  ? mark_held_locks+0x34/0xb0
[  151.797784]  ? _raw_spin_unlock_irqrestore+0x30/0x70
[  151.798581]  ? __kthread_parkme+0x79/0x110
[  151.799246]  ? trace_preempt_on+0x2a/0xf0
[  151.799902]  ? __kthread_parkme+0x79/0x110
[  151.800579]  ? preempt_count_sub+0xd6/0x130
[  151.801271]  ? __kasan_check_read+0x11/0x20
[  151.801963]  ? __kthread_parkme+0xec/0x110
[  151.802630]  ? lock_torture_stats+0x80/0x80 [dlm_locktorture]
[  151.803569]  kthread+0x192/0x1d0
[  151.804104]  ? kthread_complete_and_exit+0x30/0x30
[  151.804881]  ret_from_fork+0x1f/0x30
[  151.805480]  </TASK>

[  151.806111] Allocated by task 1347:
[  151.806681]  kasan_save_stack+0x26/0x50
[  151.807308]  kasan_set_track+0x25/0x30
[  151.807920]  kasan_save_alloc_info+0x1e/0x30
[  151.808609]  __kasan_slab_alloc+0x63/0x80
[  151.809263]  kmem_cache_alloc+0x1ad/0x830
[  151.809916]  dlm_allocate_mhandle+0x17/0x20
[  151.810590]  dlm_midcomms_get_mhandle+0x96/0x260
[  151.811344]  _create_message+0x95/0x180
[  151.811994]  create_message.isra.29.constprop.64+0x57/0xc0
[  151.812880]  send_common+0x129/0x1b0
[  151.813467]  _convert_lock+0x46/0x150
[  151.814074]  convert_lock+0x7b/0xc0
[  151.814648]  dlm_lock+0x3ac/0x580
[  151.815199]  torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]
[  151.816258]  torture_ex_iter+0xc3/0xea [dlm_locktorture]
[  151.817129]  lock_t
---truncated---

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.

Vulnerabilidad de use-after-free (CWE-416) en kernel Linux con acceso local (AV:L) sin interacción requerida (UI:N), permitiendo escalada de privilegios. El defecto en dlm_midcomms_commit_mhandle puede resultar en ejecución de código arbitrario con contexto elevado.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-53629",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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": "489d8e559c6596eb08e16447d9830bc39afbe54e",
              "lessThan": "84d6ce2aef1d06a53f606211da68a2085dfeb50d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "489d8e559c6596eb08e16447d9830bc39afbe54e",
              "lessThan": "a3b0e9ac3c2447008db942d51f593841d8329e99",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "489d8e559c6596eb08e16447d9830bc39afbe54e",
              "lessThan": "a2de9f9b686c71b4fa3663ae374f5f643c46a446",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "489d8e559c6596eb08e16447d9830bc39afbe54e",
              "lessThan": "724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/dlm/midcomms.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.20",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/dlm/midcomms.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-07T16:15:45.933",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/84d6ce2aef1d06a53f606211da68a2085dfeb50d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a2de9f9b686c71b4fa3663ae374f5f643c46a446",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a3b0e9ac3c2447008db942d51f593841d8329e99",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: dlm: fix use after free in midcomms commit\n\nWhile working on processing dlm message in softirq context I experienced\nthe following KASAN use-after-free warning:\n\n[  151.760477] ==================================================================\n[  151.761803] BUG: KASAN: use-after-free in dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[  151.763414] Read of size 4 at addr ffff88811a980c60 by task lock_torture/1347\n\n[  151.765284] CPU: 7 PID: 1347 Comm: lock_torture Not tainted 6.1.0-rc4+ #2828\n[  151.766778] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-3.module+el8.7.0+16134+e5908aa2 04/01/2014\n[  151.768726] Call Trace:\n[  151.769277]  <TASK>\n[  151.769748]  dump_stack_lvl+0x5b/0x86\n[  151.770556]  print_report+0x180/0x4c8\n[  151.771378]  ? kasan_complete_mode_report_info+0x7c/0x1e0\n[  151.772241]  ? dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[  151.773069]  kasan_report+0x93/0x1a0\n[  151.773668]  ? dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[  151.774514]  __asan_load4+0x7e/0xa0\n[  151.775089]  dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[  151.775890]  ? create_message.isra.29.constprop.64+0x57/0xc0\n[  151.776770]  send_common+0x19f/0x1b0\n[  151.777342]  ? remove_from_waiters+0x60/0x60\n[  151.778017]  ? lock_downgrade+0x410/0x410\n[  151.778648]  ? __this_cpu_preempt_check+0x13/0x20\n[  151.779421]  ? rcu_lockdep_current_cpu_online+0x88/0xc0\n[  151.780292]  _convert_lock+0x46/0x150\n[  151.780893]  convert_lock+0x7b/0xc0\n[  151.781459]  dlm_lock+0x3ac/0x580\n[  151.781993]  ? 0xffffffffc0540000\n[  151.782522]  ? torture_stop+0x120/0x120 [dlm_locktorture]\n[  151.783379]  ? dlm_scan_rsbs+0xa70/0xa70\n[  151.784003]  ? preempt_count_sub+0xd6/0x130\n[  151.784661]  ? is_module_address+0x47/0x70\n[  151.785309]  ? torture_stop+0x120/0x120 [dlm_locktorture]\n[  151.786166]  ? 0xffffffffc0540000\n[  151.786693]  ? lockdep_init_map_type+0xc3/0x360\n[  151.787414]  ? 0xffffffffc0540000\n[  151.787947]  torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]\n[  151.789004]  ? torture_stop+0x120/0x120 [dlm_locktorture]\n[  151.789858]  ? 0xffffffffc0540000\n[  151.790392]  ? lock_torture_cleanup+0x20/0x20 [dlm_locktorture]\n[  151.791347]  ? delay_tsc+0x94/0xc0\n[  151.791898]  torture_ex_iter+0xc3/0xea [dlm_locktorture]\n[  151.792735]  ? torture_start+0x30/0x30 [dlm_locktorture]\n[  151.793606]  lock_torture+0x177/0x270 [dlm_locktorture]\n[  151.794448]  ? torture_dlm_lock_sync.isra.3+0x150/0x150 [dlm_locktorture]\n[  151.795539]  ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[  151.796476]  ? do_raw_spin_lock+0x11e/0x1e0\n[  151.797152]  ? mark_held_locks+0x34/0xb0\n[  151.797784]  ? _raw_spin_unlock_irqrestore+0x30/0x70\n[  151.798581]  ? __kthread_parkme+0x79/0x110\n[  151.799246]  ? trace_preempt_on+0x2a/0xf0\n[  151.799902]  ? __kthread_parkme+0x79/0x110\n[  151.800579]  ? preempt_count_sub+0xd6/0x130\n[  151.801271]  ? __kasan_check_read+0x11/0x20\n[  151.801963]  ? __kthread_parkme+0xec/0x110\n[  151.802630]  ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[  151.803569]  kthread+0x192/0x1d0\n[  151.804104]  ? kthread_complete_and_exit+0x30/0x30\n[  151.804881]  ret_from_fork+0x1f/0x30\n[  151.805480]  </TASK>\n\n[  151.806111] Allocated by task 1347:\n[  151.806681]  kasan_save_stack+0x26/0x50\n[  151.807308]  kasan_set_track+0x25/0x30\n[  151.807920]  kasan_save_alloc_info+0x1e/0x30\n[  151.808609]  __kasan_slab_alloc+0x63/0x80\n[  151.809263]  kmem_cache_alloc+0x1ad/0x830\n[  151.809916]  dlm_allocate_mhandle+0x17/0x20\n[  151.810590]  dlm_midcomms_get_mhandle+0x96/0x260\n[  151.811344]  _create_message+0x95/0x180\n[  151.811994]  create_message.isra.29.constprop.64+0x57/0xc0\n[  151.812880]  send_common+0x129/0x1b0\n[  151.813467]  _convert_lock+0x46/0x150\n[  151.814074]  convert_lock+0x7b/0xc0\n[  151.814648]  dlm_lock+0x3ac/0x580\n[  151.815199]  torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]\n[  151.816258]  torture_ex_iter+0xc3/0xea [dlm_locktorture]\n[  151.817129]  lock_t\n---truncated---"
    }
  ],
  "lastModified": "2026-08-04T10:19:15.370",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "11DC9B79-A3D9-48E0-ACA3-BD431CD1AEE1",
              "versionEndExcluding": "6.1.20",
              "versionStartIncluding": "5.14"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "88C67289-22AD-4CA9-B202-5F5A80E5BA4B",
              "versionEndExcluding": "6.2.3",
              "versionStartIncluding": "6.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}