CVE-2026-109518
HIGH 3 PoCs
MEDIUM
Priority: 0.07
BB Relevance:
76/100
Published: 2026-11-04
Modified: 2026-11-12
First seen: 2026-11-04
Status: active
Attack Surface
Network
Low Complexity
No Auth
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Passive
S:
X
AT:
Present
VC:
High
VI:
High
VA:
High
Description
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
Weakness Classification (2)
Affected Software (105)
| Vendor | Product | Version |
|---|---|---|
| Debian | APT | 0 < 1.2.36 |
| Debian | APT | 1.4.0 < 1.4.12 |
| Debian | APT | 1.6.0 < 1.6.19 |
| Debian | APT | 1.8.0 < 1.8.2.4 |
| Debian | APT | 1.8.3 |
| Debian | APT | 2.0.0 < 2.0.12 |
| Debian | APT | 2.2.0 < 2.2.5 |
| Debian | APT | 2.4.0 < 2.4.15 |
| Debian | APT | 2.6.0 < 2.6.2 |
| Debian | APT | 2.8.0 < 2.8.4 |
| Debian | APT | 3.0.0 < 3.0.4 |
| Debian | APT | 3.2.0 < 3.2.1 |
| Debian | APT | 3.3.0 < 3.3.6 |
| Debian | APT | 0 < 1.2.36 |
| Debian | APT | 1.4.0 < 1.4.12 |
| Debian | APT | 1.6.0 < 1.6.19 |
| Debian | APT | 1.8.0 < 1.8.2.4 |
| Debian | APT | 1.8.3 |
| Debian | APT | 2.0.0 < 2.0.12 |
| Debian | APT | 2.2.0 < 2.2.5 |
| Debian | APT | 2.4.0 < 2.4.15 |
| Debian | APT | 2.6.0 < 2.6.2 |
| Debian | APT | 2.8.0 < 2.8.4 |
| Debian | APT | 3.0.0 < 3.0.4 |
| Debian | APT | 3.2.0 < 3.2.1 |
| Debian | APT | 3.3.0 < 3.3.6 |
| Debian | APT | 0 < 1.2.36 |
| Debian | APT | 1.4.0 < 1.4.12 |
| Debian | APT | 1.6.0 < 1.6.19 |
| Debian | APT | 1.8.0 < 1.8.2.4 |
Showing 30 of 105 entries
References & Advisories (4)
vendor-advisory
vendor-advisory