CVE-2026-53002
Estado: ModificadaCrítica (9.8)—
In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack: remove sprintf usage
Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check.
Increase buffer size in mangle_content_len() while at it.
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.37%
- Percentil entre todas las CVEs puntuadas: 28
- Fecha de la puntuación: 3/10/2026
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
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto secundario
T1499.004Application or System Exploitationimpact60 %
Vector CVSS AV:N/AC:L/PR:N/UI:N indica explotación remota sin privilegios (T1190). Stack overflow en kernel permite ejecución de código arbitrario (T1059) o negación de servicio (T1499.004). Buffer overflow detectado por KASAN en mangle_content_len durante procesamiento SIP/netfilter.
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 (2)
CWE
- CWE-787
- CWE-787
Referencias
- https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e
- https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956
- https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5
- https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d
- https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2
- https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3
- https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34
- https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b
- https://access.redhat.com/errata/RHSA-2026:64770
- https://access.redhat.com/errata/RHSA-2026:66000
- https://access.redhat.com/errata/RHSA-2026:66180
- https://access.redhat.com/security/cve/CVE-2026-53002
- https://bugzilla.redhat.com/show_bug.cgi?id=2492329
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53002.json
JSON original (NVD)
Mostrar
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