CVE-2026-106026

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.

CVSS 4.0

6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-10-06

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/
• https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb6475c3e1f1daf9829836b3d06f14291
• https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/tree/tftpd/remap.c?h=tftp-hpa-5.4#n762
• https://www.vulncheck.com/advisories/tftp-hpa-5.4-before-6.0-out-of-bounds-read-via-tftpd-remap-jump-rule

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