CVE-2026-106026
tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule
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.
- Record
CVE-2026-106026- CVSS 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 - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-93395
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.
- Record
EUVD-2026-93395- CVSS 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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-w9pp-27r4-r6rj
tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd...
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.
- Record
GHSA-w9pp-27r4-r6rj- CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-125
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-106026- CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
tftp-hpa 5.4 before 6.0 Out-of-Bounds Read via tftpd Remap Jump Rule
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.
- Record
CVE-2026-106026- CVSS 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 - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2026-106026- CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2026-106026- CVSS 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 - CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
tftp-hpaDebian:12 |
All versions, plus listed versions 5.2+20150808-1.45.2+20150808-25.2+20240610-15.2+20240610-25.2+20240610-3 Show 12 moreShow less5.3+20251110-15.3+20251116-15.3+20251209-15.3+20251209-25.4-15.4-27.1-17.2+20261013-17.2+20261013-27.2-17.2-27.2-3 |
None known |
tftp-hpaDebian:13 |
All versions, plus listed versions 5.2+20240610-35.3+20251110-15.3+20251116-15.3+20251209-15.3+20251209-2 Show 8 moreShow less5.4-15.4-27.1-17.2+20261013-17.2+20261013-27.2-17.2-27.2-3 |
None known |
tftp-hpaDebian:14 |
before 7.1-1, plus listed versions 5.2+20240610-35.3+20251110-15.3+20251116-15.3+20251209-15.3+20251209-25.4-15.4-2 |
7.1-1 |
tftp-hpaUbuntu:14.04:LTS |
All versions, plus listed versions 5.2-7ubuntu35.2-7ubuntu3.1 |
None known |
tftp-hpaUbuntu:16.04:LTS |
All versions, plus listed versions 5.2+20140608-3ubuntu15.2+20150808-1ubuntu15.2+20150808-1ubuntu1.16.04.1 |
None known |
tftp-hpaUbuntu:18.04:LTS |
All versions, plus listed versions 5.2+20150808-1ubuntu3 |
None known |
tftp-hpaUbuntu:20.04:LTS |
All versions, plus listed versions 5.2+20150808-1ubuntu35.2+20150808-1ubuntu4 |
None known |
tftp-hpaUbuntu:22.04:LTS |
All versions, plus listed versions 5.2+20150808-1.2build15.2+20150808-1.2build2 |
None known |
tftp-hpaUbuntu:24.04:LTS |
All versions, plus listed versions 5.2+20150808-1.45.2+20150808-1.4build1 |
None known |
tftp-hpaUbuntu:26.10 |
All versions, plus listed versions 5.3+20251209-25.4-15.4-2 |
None known |
tftp-hpaUbuntu:26.04:LTS |
All versions, plus listed versions 5.2+20240610-35.3+20251110-15.3+20251116-15.3+20251209-15.3+20251209-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-106026 is a medium vulnerability (CVSS 6.3) in H. Peter Anvin Tftp-hpa, published October 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 30th percentile. Fixed in tftp-hpa 7.1-1.
References
git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit?id=6735086fb6475c3e1f1daf9829836b3d06f14291
vulncheck.com/advisories/tftp-hpa-5.4-before-6.0-out-of-bounds-read-via-tftpd-remap-jump-rule
nvd.nist.gov/vuln/detail/CVE-2026-106026
github.com/advisories/GHSA-w9pp-27r4-r6rj