CVE-2026-109518: fallo de gravedad alta en Debian APT
APT RCE via hard link reuse
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
41Vexday Risk Score
Sin señal de explotación. Ella tiene prueba de concepto pública.
ssvc Attendcvss 7.7epss 0.9%
de la publicación al armael mismo día
Publicada en NVD4 nov
1ª PoC23 oct
On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges.
The vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
PoCs públicas encontradas — 3
githubgithub.com/jordanhardee/cve-2026-109518-apt-patch-proxmox-and-generic★ 2githubgithub.com/NeoArtemis37/PHP2shell★ 0githubgithub.com/Quaerendir/cve-2026-109518-audit★ 0⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.