All vulnerabilities
CVE-2026-106026

tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule

H. Peter Anvin tftp-hpa
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in6.0Fixed versionCVE List
Published6 Oct 2026Updated 6 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.

Text from CVE List

Affected versions 1

  • tftp-hpaaffected: 5.4 before 6.0CVE List

References 4