CVE-2025-49796
Estado: AplazadaCrítica (9.1)—
A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Puntuación base: 9.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.56%
- Percentil entre todas las CVEs puntuadas: 74
- 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.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1499.004Application or System Exploitationimpact75 %
Vector CVSS AV:N/AC:L/PR:N/UI:N → exposición remota sin autenticación (T1190). El texto describe corrupción de memoria y crash (DoS), con posible corrupción de datos sensibles en memoria.
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-125
Referencias
- https://access.redhat.com/errata/RHSA-2025:10630
- https://access.redhat.com/errata/RHSA-2025:10698
- https://access.redhat.com/errata/RHSA-2025:10699
- https://access.redhat.com/errata/RHSA-2025:11580
- https://access.redhat.com/errata/RHSA-2025:12098
- https://access.redhat.com/errata/RHSA-2025:12099
- https://access.redhat.com/errata/RHSA-2025:12199
- https://access.redhat.com/errata/RHSA-2025:12237
- https://access.redhat.com/errata/RHSA-2025:12239
- https://access.redhat.com/errata/RHSA-2025:12240
- https://access.redhat.com/errata/RHSA-2025:12241
- https://access.redhat.com/errata/RHSA-2025:13267
- https://access.redhat.com/errata/RHSA-2025:13335
- https://access.redhat.com/errata/RHSA-2025:15397
- https://access.redhat.com/errata/RHSA-2025:15827
- https://access.redhat.com/errata/RHSA-2025:15828
- https://access.redhat.com/errata/RHSA-2025:18217
- https://access.redhat.com/errata/RHSA-2025:18218
- https://access.redhat.com/errata/RHSA-2025:18219
- https://access.redhat.com/errata/RHSA-2025:18240
- https://access.redhat.com/errata/RHSA-2025:19020
- https://access.redhat.com/errata/RHSA-2025:19041
- https://access.redhat.com/errata/RHSA-2025:19046
- https://access.redhat.com/errata/RHSA-2025:19894
- https://access.redhat.com/errata/RHSA-2025:21913
- https://access.redhat.com/errata/RHSA-2026:0934
- https://access.redhat.com/errata/RHSA-2026:62549
- https://access.redhat.com/errata/RHSA-2026:67857
- https://access.redhat.com/errata/RHSA-2026:7519
- https://access.redhat.com/security/cve/CVE-2025-49796
- https://bugzilla.redhat.com/show_bug.cgi?id=2372385
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/933
- https://lists.debian.org/debian-lts-announce/2025/07/msg00014.html
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
- https://cert-portal.siemens.com/productcert/html/ssa-577017.html
JSON original (NVD)
Mostrar
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