Answer in brief
CVE-2026-109518 records a High severity (CVSS 7.7) vulnerability in APT RCE via hard link reuse. The current sources do not mark it as known exploited. The current feed maps Debian/APT (generic), Ubuntu/APT (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Debian/APT (generic), Ubuntu/APT (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Debian/APTgeneric | >=0 <1.2.36 || >=1.4.0 <1.4.12 || >=1.6.0 <1.6.19 || >=1.8.0 <1.8.2.4 || >=1.8.3 <=1.8.5 || >=2.0.0 <2.0.12 || >=2.2.0 <2.2.5 || >=2.4.0 <2.4.15 || >=2.6.0 <2.6.2 || >=2.8.0 <2.8.4 || >=3.0.0 <3.0.4 || >=3.2.0 <3.2.1 || >=3.3.0 <3.3.6 | 1.2.36, 1.4.12, 1.6.19, 1.8.2.4, 2.0.12, 2.2.5, 2.4.15, 2.6.2, 2.8.4, 3.0.4, 3.2.1, 3.3.6 |
| Ubuntu/APTgeneric | >=0 <1.0.1ubuntu2.24+esm4 || >=1.2.0 <1.2.36+esm1 || >=1.6.0 <1.6.19+esm1 || >=2.0.0 <2.0.12+esm1 || >=2.4.0 <2.4.15ubuntu0.1 || >=2.8.0 <2.8.4ubuntu0.1 || >=3.2.0 <3.2.1ubuntu0.1 || >=3.3.0 <3.3.3ubuntu0.1 | 1.0.1ubuntu2.24+esm4, 1.2.36+esm1, 1.6.19+esm1, 2.0.12+esm1, 2.4.15ubuntu0.1, 2.8.4ubuntu0.1, 3.2.1ubuntu0.1, 3.3.3ubuntu0.1 |
Published upstream
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 4, 2026
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
Quoted source text, attributed separately from HOL analysis.