CVE-2026-106026

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

State: Published
Severity: 6.3 Medium
Published: Oct 6, 2026
Updated: Oct 6, 2026
Reserved: Oct 6, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L	VulnCheck

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
tftp-hpaH. Peter Anvin	5.4 to before 6.0Affected

References

Patch Commitpatch
Vulnerable label search in rewrite_string() (tftp-hpa 5.4)technical-description
https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/product
VulnCheck Advisory: tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rulethird-party-advisory

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