Description
Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.
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 | shadow | 1:4.4-1 | — |
| Debian 13 | shadow | 1:4.4-1 | — |
| Debian 12 | shadow | 1:4.4-1 | — |
| Debian 8 | shadow | 1:4.2-3+deb8u3 | DSA-3793-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | shadow | 1:4.2-3.1ubuntu5.2 | USN-3276-1 |
| Ubuntu 14.04 LTS | shadow | 1:4.1.5.1-1ubuntu9.4 | USN-3276-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-1 |
| SLES 12 SP2 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-2, SUSE-SU-2018:1997-1 |
| SLES 12 SP1 | shadow | 4.1.5.1-19.8.1 | SUSE-SU-2018:1995-1 |
| SLES 12 | shadow | 4.1.5.1-19.8.1 | SUSE-SU-2018:1995-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-1 |
| SLES for SAP 12 SP2 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-1 |
| SLES for SAP 12 SP1 | shadow | 4.1.5.1-19.8.1 | SUSE-SU-2018:1995-1 |
| SUSE OpenStack Cloud 7 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-1 |
| SUSE Enterprise Storage 4 | shadow | 4.2.1-27.9.1 | SUSE-SU-2018:1997-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | shadow | 4.2.1-r7 | — |
| Alpine v3.23 | shadow | 4.2.1-r7 | — |
| Alpine v3.22 | shadow | 4.2.1-r7 | — |
| Alpine v3.21 | shadow | 4.2.1-r7 | — |
| Alpine v3.20 | shadow | 4.2.1-r7 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | shadow | 4.2.1-r7 | — |
| Alpine v3.18 | shadow | 4.2.1-r7 | — |
| Alpine v3.17 | shadow | 4.2.1-r7 | — |
| Alpine v3.16 | shadow | 4.2.1-r7 | — |
| Alpine v3.15 | shadow | 4.2.1-r7 | — |
| Alpine v3.14 | shadow | 4.2.1-r7 | — |
| Alpine v3.13 | shadow | 4.2.1-r7 | — |
| Alpine v3.12 | shadow | 4.2.1-r7 | — |
| Alpine v3.11 | shadow | 4.2.1-r7 | — |
| Alpine v3.10 | shadow | 4.2.1-r7 | — |
| Alpine v3.9 | shadow | 4.2.1-r7 | — |
| Alpine v3.8 | shadow | 4.2.1-r7 | — |
| Alpine v3.7 | shadow | 4.2.1-r7 | — |
| Alpine v3.6 | shadow | 4.2.1-r7 | — |
| Alpine v3.5 | shadow | 4.2.1-r7 | — |
Advisories 5
- DSA-3793-1 shadow - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3276-1 shadow vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:1995-1 Security update for shadow SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1997-2 Security update for shadow SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1997-1 Security update for shadow SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [oss-security] 20160719 Re: subuid security patches for shadow package mailing-list
- 92055 vdb-entry
- GLSA-201706-02 vendor-advisory
- https://github.com/shadow-maint/shadow/issues/27
- https://bugzilla.suse.com/show_bug.cgi?id=979282
- [oss-security] 20160725 Re: Re: [Pkg-shadow-devel] subuid security patches for shadow package mailing-list
- [oss-security] 20160719 subuid security patches for shadow package mailing-list
- [oss-security] 20160720 Re: subuid security patches for shadow package mailing-list
- DSA-3793 vendor-advisory