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TI-2026-68427 Aliases CVE-2026-106026GHSA-w9pp-27r4-r6rj

Out-of-bounds read in tftp-hpa remap jump rule handling

Priority LOW 28CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

tftp-hpa 5.4 before 6.0 contains an out-of-bounds read in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. An unauthenticated remote attacker can send a read or write request whose filename matches a remap jump rule, crashing the forked in.tftpd request handler. The flaw is tracked as CWE-125.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00368 30th percentileScored 2026-11-07
Fix Fixed tftp-hpa (H. Peter Anvin): 6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
H. Peter Anvintftp-hpa5.4 to before 6.06.0Patch availableCNA
  • tftp-hpa VendorH. Peter Anvin Affected 5.4 to before 6.0 Fixed in 6.0 Patch available CNA

Remediation

Update tftp-hpa to version 6.0 or later, which fixes this flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA tftp-hpa (H. Peter Anvin) Fixed in 6.0

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-106026
  2. 2026-10-06 Alias added: GHSA-w9pp-27r4-r6rj
  3. 2026-10-06 CISA SSVC decision points changed
  4. 2026-10-06 Priority changed: MEDIUM → LOW

References

Patch 1

Other 2

  • TI-2011-01921 Buffer overflow in tftp-hpa before 5.1 allows remote attackers to cause a denial of… CVSS 2.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences