Description
socat 1.2.0.0 before 1.7.2.2 and 2.0.0-b1 before 2.0.0-b6, when used for a listen type address and the fork option is enabled, allows remote attackers to cause a denial of service (file descriptor consumption) via multiple request that are refused based on the (1) sourceport, (2) lowport, (3) range, or (4) tcpwrap restrictions.
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 | socat | 1.7.1.3-1.5 | — |
| Debian 13 | socat | 1.7.1.3-1.5 | — |
| Debian 12 | socat | 1.7.1.3-1.5 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | socat | 1.7.0.0-1.18.2 | SUSE-SU-2016:0343-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | socat | 1.7.0.0-1.18.2 | SUSE-SU-2016:0343-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | socat | 1.7.3.1-2.7 | openSUSE-SU-2024:10371-1 |
Advisories 2
- SUSE-SU-2016:0343-1 Security update for socat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10371-1 socat-1.7.3.1-2.7 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026