Bollettino del 28 ottobre 2026
CVE-2026-46300: Kernel (Linux)
Vulnerabilità già sfruttata in attacchi reali, punteggio 7,8 su 10, in Kernel (Linux). Richiede accesso al dispositivo, con un account già valido, senza che nessuno faccia nulla. Tipo: scrittura fuori dai limiti della memoria.
- Gravità
- 7,8 su 10 (high)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Sfruttamento
- Sfruttata in attacchi reali (catalogo CISA KEV).
- Scadenza CISA
- Le agenzie federali USA devono correggerla entro il 31 ottobre 2026: un buon riferimento anche per voi.
- Tipo di difetto
- CWE-123
CWE-456
CWE-787: scrittura fuori dai limiti della memoria - Pubblicata
- 23 maggio 2026
Descrizione originale
Linux Kernel contains a missing initialization of a variable vulnerability that could allow for unintended modification of page-cache-backed data via failure to preserve the shared-fragment marker during socket buffer coalescing, causing ESP input processing to decrypt shared fragments in place. This vulnerability can be chained with CVE-2026-109618 and CVE-2026-109619 to implant PHP webshells and run commands as root.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Fonti
- Scheda NVD
- git.kernel.org/stable/c/2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c
- git.kernel.org/stable/c/3599e6b3cc1ada96883d496a50a210d3afbb6987
- git.kernel.org/stable/c/3884358a9286b17f389a72b1426fc4547c23c111
- git.kernel.org/stable/c/3bd9e113d50034db99d7ef69fd8e5242d15e414a
- git.kernel.org/stable/c/760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e
- git.kernel.org/stable/c/78bf6b6bb19541d19fbda6242e7cfe2c682763c0