CVE-2018-18439
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP...
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
CVE-2018-18439- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
CVE-2018-18439- Updated
- 2026-11-02
EUVDEUVD-2018-10167 No score
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
EUVD-2018-10167- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vqxq-jmxf-f53r
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP...
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
GHSA-vqxq-jmxf-f53r- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSV
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
CVE-2018-18439- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-18439
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
DEBIAN-CVE-2018-18439- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-18439
DENX U-Boot through 2018.09-rc1 has a remotely exploitable buffer overflow via a malicious TFTP server because TFTP traffic is mishandled. Also, local exploitation can occur via a crafted kernel image.
- Record
UBUNTU-CVE-2018-18439- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
u-bootDebian:12 |
All versions, plus listed versions 2023.01+dfsg-22023.01+dfsg-2+deb12u12023.01+dfsg-2+deb12u22023.01+dfsg-2+deb12u32023.04+dfsg-1 Show 20 moreShow less2023.04~rc2+dfsg-12023.04~rc5+dfsg-12023.07+dfsg-12023.07~rc4+dfsg-12023.07~rc5+dfsg-12024.01+dfsg-12024.01+dfsg-22024.01+dfsg-32024.01+dfsg-42024.01+dfsg-52024.01+dfsg-62024.01+dfsg-72024.01~rc6+dfsg-12024.01~rc6+dfsg-22025.01-12025.01-22025.01-32025.01-3.12025.01-3.22026.10~rc5-1 |
None known |
u-bootDebian:13 |
All versions, plus listed versions 2025.01-32025.01-3+deb13u12025.01-3.12025.01-3.22026.10~rc5-1 |
None known |
u-bootDebian:14 |
All versions, plus listed versions 2025.01-32025.01-3.12025.01-3.22026.10~rc5-1 |
None known |
u-bootUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2015.04+dfsg1-2ubuntu12015.10+dfsg1-22015.10+dfsg1-32015.10+dfsg1-42016.01+dfsg1-1 Show 7 moreShow less2016.01+dfsg1-1ubuntu12016.01+dfsg1-2ubuntu12016.01+dfsg1-2ubuntu22016.01+dfsg1-2ubuntu32016.01+dfsg1-2ubuntu52016.01+dfsg1-2ubuntu5+esm12016.01+dfsg1-2ubuntu5+esm2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-18439 is a critical vulnerability (CVSS 9.8) in Denx U-boot, published November 20, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.04%, the 81st percentile. No source names a fixed version.