Description
The signal handler implementations in socat before 1.7.3.0 and 2.0.0-b8 allow remote attackers to cause a denial of service (process freeze or crash).
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 | 1.7.2.4-2 | — |
| Debian 13 | socat | 1.7.2.4-2 | — |
| Debian 12 | socat | 1.7.2.4-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | socat | 1.7.2.3-1ubuntu0.1~esm1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | socat | 1.7.2.4-4.6.1 | SUSE-SU-2025:0726-1 |
Advisories 1
- SUSE-SU-2025:0726-1 Security update for socat SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://www.dest-unreach.org/socat/
- [oss-security] 20150406 Socat security advisory 6 - Possible DoS with fork (update: CVE-Id: CVE-2015-1379; fix for version 2) mailing-list
- 72321 vdb-entry
- [oss-security] 20150127 Re: Socat security advisory 6 - Possible DoS with fork mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1185711