Description
tgt (aka Linux target framework) before 1.0.93 attempts to achieve entropy by calling rand without srand. The PRNG seed is always 1, and thus the sequence of challenges is always identical.
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 | tgt | 1:1.0.85-1.3 | — |
| Debian 13 | tgt | 1:1.0.85-1.3 | — |
| Debian 12 | tgt | 1:1.0.85-1+deb12u1 | — |
| Debian 11 | tgt | 1:1.0.80-1+deb11u1 | DLA-3976-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | tgt | 1:1.0.79-2ubuntu1.1 | USN-7024-1 |
| Ubuntu 16.04 LTS | iscsitarget | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | tgt | 1:1.0.85-1.1ubuntu6+esm1 | USN-8325-1 |
| Ubuntu Pro 22.04 LTS | tgt | 1:1.0.80-1ubuntu2+esm1 | USN-8325-1 |
| Ubuntu Pro 18.04 LTS | tgt | 1:1.0.72-1ubuntu1+esm1 | USN-8325-1 |
| Ubuntu Pro 16.04 LTS | tgt | 1:1.0.63-1ubuntu1.1+esm1 | USN-8325-1 |
| Ubuntu Pro 14.04 LTS | tgt | 1:1.0.43-0ubuntu4.1~14.04.3+esm1 | USN-8325-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | tgt | 1.0.85-150600.10.3.1 | SUSE-SU-2025:02740-1 |
| SLES 15 SP6 | tgt | 1.0.85-150600.10.3.1 | SUSE-SU-2025:02740-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | tgt | 1.0.85-150600.10.3.1 | SUSE-SU-2025:02740-1 |
Advisories 4
- USN-8325-1 tgt vulnerability Ubuntu Security Notices (USN) · May 27, 2026
- USN-7024-1 tgt vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3976-1 tgt - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:02740-1 Security update for tgt SUSE / openSUSE Security Updates · Feb 4, 2026