CVE-2026-53071
Estado: ModificadaAlta (8.8)—
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it.
Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.43%
- Percentil entre todas las CVEs puntuadas: 35
- 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.
- Explotación
T1210Exploitation of Remote Serviceslateral movement75 % - Impacto principal
T1059Command and Scripting Interpreterexecution60 % - Impacto secundario
T1499.004Application or System Exploitationimpact70 %
Vulnerabilidad de corrupción de memoria en Bluetooth L2CAP por race condition exploitable remotamente. AV:A (red adyacente, BLE) sin privilegios permite T1210. Impactos: ejecución de código (corrupción de estructuras kernel) y denegación de servicio (crash por iteración corrupta de lista).
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
- CWE-667
- CWE-416
Referencias
- https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c
- https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c
- https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab
- https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e
- https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917
- https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae
- https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c
- https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14
- https://access.redhat.com/errata/RHSA-2026:42550
- https://access.redhat.com/errata/RHSA-2026:42552
- https://access.redhat.com/errata/RHSA-2026:42919
- https://access.redhat.com/errata/RHSA-2026:43307
- https://access.redhat.com/errata/RHSA-2026:65710
- https://access.redhat.com/errata/RHSA-2026:65711
- https://access.redhat.com/errata/RHSA-2026:67721
- https://access.redhat.com/errata/RHSA-2026:67723
- https://access.redhat.com/security/cve/CVE-2026-53071
- https://bugzilla.redhat.com/show_bug.cgi?id=2492458
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json
JSON original (NVD)
Mostrar
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