Description
In Das U-Boot versions 2016.11-rc1 through 2019.07-rc4, an underflow can cause memcpy() to overwrite a very large amount of data (including the whole stack) while reading a crafted ext4 filesystem.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | u-boot | 2020.01+dfsg-1 | — |
| Debian 13 | u-boot | 2020.01+dfsg-1 | — |
| Debian 12 | u-boot | 2020.01+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | u-boot | 2021.01+dfsg-3ubuntu0~20.04.3 | — |
| Ubuntu 18.04 LTS | u-boot | 2020.10+dfsg-1ubuntu0~18.04.2 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | u-boot +1 | 2019.01-7.3.1 | SUSE-SU-2019:2475-1 |
| SLES 15 | u-boot +1 | 2018.03-4.3.1 | SUSE-SU-2019:2474-1 |
| SLES 12 SP4 | u-boot +1 | 2018.03-4.3.1 | SUSE-SU-2020:3256-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | u-boot | 2019.01-lp151.6.3.1 | openSUSE-SU-2019:2233-1 |
| openSUSE Leap 15.0 | u-boot | 2018.03-lp150.4.3.1 | openSUSE-SU-2019:2235-1 |
Advisories 8
- ICSA-26-134-16 Siemens Ruggedcom Rox CISA ICS & IT advisories · May 14, 2026
- NCSC-2026-0147 Kwetsbaarheden verholpen in Siemens-producten NCSC-NL (Netherlands) · May 13, 2026
- SSA-577017 SSA-577017: Multiple Vulnerabilities in Ruggedcom Rox Before 2.17.1 Siemens ProductCERT · May 12, 2026
- openSUSE-SU-2019:2233-1 Security update for u-boot SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3256-1 Security update for u-boot SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2474-1 Security update for u-boot SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2475-1 Security update for u-boot SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2235-1 Security update for u-boot SUSE / openSUSE Security Updates · Feb 4, 2026