SB2026041024 - Fedora 43 update for erlang
Published: April 10, 2026
Security Bulletin ID
SB2026041024
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Relative Path Traversal (CVE-ID: CVE-2026-21620)
The vulnerability allows a remote user to read and write arbitrary files.
The vulnerability exists due to relative path traversal in the Erlang/OTP TFTP server when handling remote file requests with ../ path components while using the undocumented root_dir option. A remote user can send crafted file requests to read and write arbitrary files.
Exploitation requires that the system designer used the undocumented {root_dir,RootDir} option under incorrect assumptions and that the service is reachable from untrusted hosts.
Remediation
Install update from vendor's website.