CVE-2023-53560

Estado: ModificadaAlta (7.8)—

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

tracing/histograms: Add histograms to hist_vars if they have referenced variables

Hist triggers can have referenced variables without having direct variables fields. This can be the case if referenced variables are added for trigger actions. In this case the newly added references will not have field variables. Not taking such referenced variables into consideration can result in a bug where it would be possible to remove hist trigger with variables being refenced. This will result in a bug that is easily reproducable like so

$ cd /sys/kernel/tracing $ echo 'synthetic_sys_enter char[] comm; long id' >> synthetic_events $ echo 'hist:keys=common_pid.execname,id.syscall:vals=hitcount:comm=common_pid.execname' >> events/raw_syscalls/sys_enter/trigger $ echo 'hist:keys=common_pid.execname,id.syscall:onmatch(raw_syscalls.sys_enter).synthetic_sys_enter($comm, id)' >> events/raw_syscalls/sys_enter/trigger $ echo '!hist:keys=common_pid.execname,id.syscall:vals=hitcount:comm=common_pid.execname' >> events/raw_syscalls/sys_enter/trigger

Detalles técnicos trazas, registros y código del informe original

[  100.263533] ==================================================================
[  100.264634] BUG: KASAN: slab-use-after-free in resolve_var_refs+0xc7/0x180
[  100.265520] Read of size 8 at addr ffff88810375d0f0 by task bash/439
[  100.266320]
[  100.266533] CPU: 2 PID: 439 Comm: bash Not tainted 6.5.0-rc1 #4
[  100.267277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-20220807_005459-localhost 04/01/2014
[  100.268561] Call Trace:
[  100.268902]  <TASK>
[  100.269189]  dump_stack_lvl+0x4c/0x70
[  100.269680]  print_report+0xc5/0x600
[  100.270165]  ? resolve_var_refs+0xc7/0x180
[  100.270697]  ? kasan_complete_mode_report_info+0x80/0x1f0
[  100.271389]  ? resolve_var_refs+0xc7/0x180
[  100.271913]  kasan_report+0xbd/0x100
[  100.272380]  ? resolve_var_refs+0xc7/0x180
[  100.272920]  __asan_load8+0x71/0xa0
[  100.273377]  resolve_var_refs+0xc7/0x180
[  100.273888]  event_hist_trigger+0x749/0x860
[  100.274505]  ? kasan_save_stack+0x2a/0x50
[  100.275024]  ? kasan_set_track+0x29/0x40
[  100.275536]  ? __pfx_event_hist_trigger+0x10/0x10
[  100.276138]  ? ksys_write+0xd1/0x170
[  100.276607]  ? do_syscall_64+0x3c/0x90
[  100.277099]  ? entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[  100.277771]  ? destroy_hist_data+0x446/0x470
[  100.278324]  ? event_hist_trigger_parse+0xa6c/0x3860
[  100.278962]  ? __pfx_event_hist_trigger_parse+0x10/0x10
[  100.279627]  ? __kasan_check_write+0x18/0x20
[  100.280177]  ? mutex_unlock+0x85/0xd0
[  100.280660]  ? __pfx_mutex_unlock+0x10/0x10
[  100.281200]  ? kfree+0x7b/0x120
[  100.281619]  ? ____kasan_slab_free+0x15d/0x1d0
[  100.282197]  ? event_trigger_write+0xac/0x100
[  100.282764]  ? __kasan_slab_free+0x16/0x20
[  100.283293]  ? __kmem_cache_free+0x153/0x2f0
[  100.283844]  ? sched_mm_cid_remote_clear+0xb1/0x250
[  100.284550]  ? __pfx_sched_mm_cid_remote_clear+0x10/0x10
[  100.285221]  ? event_trigger_write+0xbc/0x100
[  100.285781]  ? __kasan_check_read+0x15/0x20
[  100.286321]  ? __bitmap_weight+0x66/0xa0
[  100.286833]  ? _find_next_bit+0x46/0xe0
[  100.287334]  ? task_mm_cid_work+0x37f/0x450
[  100.287872]  event_triggers_call+0x84/0x150
[  100.288408]  trace_event_buffer_commit+0x339/0x430
[  100.289073]  ? ring_buffer_event_data+0x3f/0x60
[  100.292189]  trace_event_raw_event_sys_enter+0x8b/0xe0
[  100.295434]  syscall_trace_enter.constprop.0+0x18f/0x1b0
[  100.298653]  syscall_enter_from_user_mode+0x32/0x40
[  100.301808]  do_syscall_64+0x1a/0x90
[  100.304748]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[  100.307775] RIP: 0033:0x7f686c75c1cb
[  100.310617] Code: 73 01 c3 48 8b 0d 65 3c 10 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 21 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 35 3c 10 00 f7 d8 64 89 01 48
[  100.317847] RSP: 002b:00007ffc60137a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000021
[  100.321200] RA
---truncated---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %

Vulnerabilidad de use-after-free (CWE-416) en kernel Linux con acceso local (AV:L/PR:L) sin interacción del usuario. La explotación permite escalada de privilegios mediante manipulación de tracing histograms. El impacto es ejecución de código en 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 Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-53560",
  "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
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      {
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          "attackVector": "LOCAL",
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          "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": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "4ffad1528e81c91769d9da1f8436080861c8ec67",
              "versionType": "git"
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            {
              "status": "affected",
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              "lessThan": "4815359056083c555f97a5ee3af86519be5166de",
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            {
              "status": "affected",
              "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "1576f0df7b4d1f82db588d6654b89d796fa06929",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "97f54b330c797ed27fba8791baeaa38ace886cbd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "5fd32eb6fa0ac795aa5a64bc004ab68d7b44196a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "4a540f63618e525e433b37d2b5522cda08e321d7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13",
              "lessThan": "6018b585e8c6fa7d85d4b38d9ce49a5b67be7078",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/trace/trace_events_hist.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.19.291",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.251",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.188",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.121",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/trace/trace_events_hist.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-04T16:15:51.397",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1576f0df7b4d1f82db588d6654b89d796fa06929",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4815359056083c555f97a5ee3af86519be5166de",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4a540f63618e525e433b37d2b5522cda08e321d7",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4ffad1528e81c91769d9da1f8436080861c8ec67",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5fd32eb6fa0ac795aa5a64bc004ab68d7b44196a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6018b585e8c6fa7d85d4b38d9ce49a5b67be7078",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/97f54b330c797ed27fba8791baeaa38ace886cbd",
      "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\ntracing/histograms: Add histograms to hist_vars if they have referenced variables\n\nHist triggers can have referenced variables without having direct\nvariables fields. This can be the case if referenced variables are added\nfor trigger actions. In this case the newly added references will not\nhave field variables. Not taking such referenced variables into\nconsideration can result in a bug where it would be possible to remove\nhist trigger with variables being refenced. This will result in a bug\nthat is easily reproducable like so\n\n$ cd /sys/kernel/tracing\n$ echo 'synthetic_sys_enter char[] comm; long id' >> synthetic_events\n$ echo 'hist:keys=common_pid.execname,id.syscall:vals=hitcount:comm=common_pid.execname' >> events/raw_syscalls/sys_enter/trigger\n$ echo 'hist:keys=common_pid.execname,id.syscall:onmatch(raw_syscalls.sys_enter).synthetic_sys_enter($comm, id)' >> events/raw_syscalls/sys_enter/trigger\n$ echo '!hist:keys=common_pid.execname,id.syscall:vals=hitcount:comm=common_pid.execname' >> events/raw_syscalls/sys_enter/trigger\n\n[  100.263533] ==================================================================\n[  100.264634] BUG: KASAN: slab-use-after-free in resolve_var_refs+0xc7/0x180\n[  100.265520] Read of size 8 at addr ffff88810375d0f0 by task bash/439\n[  100.266320]\n[  100.266533] CPU: 2 PID: 439 Comm: bash Not tainted 6.5.0-rc1 #4\n[  100.267277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-20220807_005459-localhost 04/01/2014\n[  100.268561] Call Trace:\n[  100.268902]  <TASK>\n[  100.269189]  dump_stack_lvl+0x4c/0x70\n[  100.269680]  print_report+0xc5/0x600\n[  100.270165]  ? resolve_var_refs+0xc7/0x180\n[  100.270697]  ? kasan_complete_mode_report_info+0x80/0x1f0\n[  100.271389]  ? resolve_var_refs+0xc7/0x180\n[  100.271913]  kasan_report+0xbd/0x100\n[  100.272380]  ? resolve_var_refs+0xc7/0x180\n[  100.272920]  __asan_load8+0x71/0xa0\n[  100.273377]  resolve_var_refs+0xc7/0x180\n[  100.273888]  event_hist_trigger+0x749/0x860\n[  100.274505]  ? kasan_save_stack+0x2a/0x50\n[  100.275024]  ? kasan_set_track+0x29/0x40\n[  100.275536]  ? __pfx_event_hist_trigger+0x10/0x10\n[  100.276138]  ? ksys_write+0xd1/0x170\n[  100.276607]  ? do_syscall_64+0x3c/0x90\n[  100.277099]  ? entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n[  100.277771]  ? destroy_hist_data+0x446/0x470\n[  100.278324]  ? event_hist_trigger_parse+0xa6c/0x3860\n[  100.278962]  ? __pfx_event_hist_trigger_parse+0x10/0x10\n[  100.279627]  ? __kasan_check_write+0x18/0x20\n[  100.280177]  ? mutex_unlock+0x85/0xd0\n[  100.280660]  ? __pfx_mutex_unlock+0x10/0x10\n[  100.281200]  ? kfree+0x7b/0x120\n[  100.281619]  ? ____kasan_slab_free+0x15d/0x1d0\n[  100.282197]  ? event_trigger_write+0xac/0x100\n[  100.282764]  ? __kasan_slab_free+0x16/0x20\n[  100.283293]  ? __kmem_cache_free+0x153/0x2f0\n[  100.283844]  ? sched_mm_cid_remote_clear+0xb1/0x250\n[  100.284550]  ? __pfx_sched_mm_cid_remote_clear+0x10/0x10\n[  100.285221]  ? event_trigger_write+0xbc/0x100\n[  100.285781]  ? __kasan_check_read+0x15/0x20\n[  100.286321]  ? __bitmap_weight+0x66/0xa0\n[  100.286833]  ? _find_next_bit+0x46/0xe0\n[  100.287334]  ? task_mm_cid_work+0x37f/0x450\n[  100.287872]  event_triggers_call+0x84/0x150\n[  100.288408]  trace_event_buffer_commit+0x339/0x430\n[  100.289073]  ? ring_buffer_event_data+0x3f/0x60\n[  100.292189]  trace_event_raw_event_sys_enter+0x8b/0xe0\n[  100.295434]  syscall_trace_enter.constprop.0+0x18f/0x1b0\n[  100.298653]  syscall_enter_from_user_mode+0x32/0x40\n[  100.301808]  do_syscall_64+0x1a/0x90\n[  100.304748]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n[  100.307775] RIP: 0033:0x7f686c75c1cb\n[  100.310617] Code: 73 01 c3 48 8b 0d 65 3c 10 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 21 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 35 3c 10 00 f7 d8 64 89 01 48\n[  100.317847] RSP: 002b:00007ffc60137a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000021\n[  100.321200] RA\n---truncated---"
    }
  ],
  "lastModified": "2026-08-04T10:19:12.430",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A7B10DBD-AA2C-4B0A-A23E-A88527BACFC0",
              "versionEndExcluding": "4.19.291",
              "versionStartIncluding": "4.17"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7FA663C4-CA72-4B5A-8592-7354D978F58E",
              "versionEndExcluding": "5.4.251",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "43CAE50A-4A6C-488E-813C-F8DB77C13C8B",
              "versionEndExcluding": "5.10.188",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EC77775B-EC31-4966-966C-1286C02B2A85",
              "versionEndExcluding": "5.15.121",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "69315BCC-36D2-45CD-84F8-381EDF8E38F3",
              "versionEndExcluding": "6.1.40",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "923F6AEA-C2EF-4B08-B038-69A18F3D41F8",
              "versionEndExcluding": "6.4.5",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}