CVE-2026-5121
Estado: ModificadaAlta (7.5)—
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.43%
- Percentil entre todas las CVEs puntuadas: 72
- 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 access95 % - Impacto principal
T1059Command and Scripting Interpreterexecution85 %
Vector CVSS AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). El overflow en libarchive permite ejecución de código arbitrario mediante ISO9660 malformado (T1059).
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 (4)
CWE
- CWE-190
- CWE-190
Referencias
- https://access.redhat.com/errata/RHSA-2026:10065
- https://access.redhat.com/errata/RHSA-2026:10097
- https://access.redhat.com/errata/RHSA-2026:11768
- https://access.redhat.com/errata/RHSA-2026:12071
- https://access.redhat.com/errata/RHSA-2026:12274
- https://access.redhat.com/errata/RHSA-2026:13812
- https://access.redhat.com/errata/RHSA-2026:14773
- https://access.redhat.com/errata/RHSA-2026:14937
- https://access.redhat.com/errata/RHSA-2026:15087
- https://access.redhat.com/errata/RHSA-2026:16008
- https://access.redhat.com/errata/RHSA-2026:16009
- https://access.redhat.com/errata/RHSA-2026:16030
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:17596
- https://access.redhat.com/errata/RHSA-2026:19724
- https://access.redhat.com/errata/RHSA-2026:19725
- https://access.redhat.com/errata/RHSA-2026:20040
- https://access.redhat.com/errata/RHSA-2026:21690
- https://access.redhat.com/errata/RHSA-2026:25096
- https://access.redhat.com/errata/RHSA-2026:72502
- https://access.redhat.com/errata/RHSA-2026:8510
- https://access.redhat.com/errata/RHSA-2026:8517
- https://access.redhat.com/errata/RHSA-2026:8521
- https://access.redhat.com/errata/RHSA-2026:8534
- https://access.redhat.com/errata/RHSA-2026:8864
- https://access.redhat.com/errata/RHSA-2026:8866
- https://access.redhat.com/errata/RHSA-2026:8867
- https://access.redhat.com/errata/RHSA-2026:8873
- https://access.redhat.com/errata/RHSA-2026:8908
- https://access.redhat.com/errata/RHSA-2026:8944
- https://access.redhat.com/errata/RHSA-2026:9026
- https://access.redhat.com/errata/RHSA-2026:9592
- https://access.redhat.com/errata/RHSA-2026:9832
- https://access.redhat.com/security/cve/CVE-2026-5121
- https://bugzilla.redhat.com/show_bug.cgi?id=2452945
- https://github.com/advisories/GHSA-2vwv-vqpv-v8vc
- https://github.com/libarchive/libarchive/pull/2934
- https://cert-portal.siemens.com/productcert/html/ssa-585531.html
JSON original (NVD)
Mostrar
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