CVE-2026-53361
Estado: ModificadaAlta (7.1)—
In the Linux kernel, the following vulnerability has been resolved:
af_unix: Set gc_in_progress to true in unix_gc().
Igor Ushakov reported that unix_gc() could run with gc_in_progress being false if the work is scheduled while running:
unix_peek_fpl() relies on gc_in_progress not to confuse GC by MSG_PEEK.
Let's set gc_in_progress to true in unix_gc().
Detalles técnicos trazas, registros y código del informe original
Thread 1 Thread 2 Thread 3
-------- -------- --------
unix_schedule_gc() unix_schedule_gc()
`- if (!gc_in_progress) `- if (!gc_in_progress)
|- gc_in_progress = true |
`- queue_work() |
unix_gc() <----------------/ |
| |- gc_in_progress = true
... `- queue_work()
| |
`- gc_in_progress = false |
|
unix_gc() <---------------------------------------------'
|
... /* gc_in_progress == false */
|
`- gc_in_progress = falseCVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 4/10/2026
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.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1499.004Application or System Exploitationimpact65 % - Impacto secundario
T1565.001Stored Data Manipulationimpact55 %
Vulnerabilidad de escalada de privilegios local en kernel Linux (AV:L, PR:L, UI:N) que permite DoS o corrupción de datos mediante condición de carrera en gc_in_progress, explotable por usuario local.
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
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/0cfa78c050662784fc8e3ab26dbfd1dc632b2082
- https://git.kernel.org/stable/c/20aa894d475bd8086b25c1113ec4ca70f70c7a98
- https://git.kernel.org/stable/c/591f1ac217428a6d2b32a8ac14aac0fab44f155a
- https://git.kernel.org/stable/c/82c17e13d404f686e164590483fd6c1abaa675d0
- https://git.kernel.org/stable/c/d82ba05263c69fa2437fe93e4e561cc40f4c03af
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Set gc_in_progress to true in unix_gc().\n\nIgor Ushakov reported that unix_gc() could run with gc_in_progress\nbeing false if the work is scheduled while running:\n\n Thread 1 Thread 2 Thread 3\n -------- -------- --------\n unix_schedule_gc() unix_schedule_gc()\n `- if (!gc_in_progress) `- if (!gc_in_progress)\n |- gc_in_progress = true |\n `- queue_work() |\n unix_gc() <----------------/ |\n | |- gc_in_progress = true\n ... `- queue_work()\n | |\n `- gc_in_progress = false |\n |\n unix_gc() <---------------------------------------------'\n |\n ... /* gc_in_progress == false */\n |\n `- gc_in_progress = false\n\nunix_peek_fpl() relies on gc_in_progress not to confuse GC\nby MSG_PEEK.\n\nLet's set gc_in_progress to true in unix_gc()."
}
],
"lastModified": "2026-08-19T17:19:23.430",
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