Description
stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
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 13 | stunnel4 | 3:4.42-1 | — |
| Debian 12 | stunnel4 | 3:4.42-1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | stunnel | 5.38-1.1 | openSUSE-SU-2024:10289-1 |
Advisories 1
- openSUSE-SU-2024:10289-1 stunnel-5.38-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [oss-security] 20110819 CVE request: stunnel 4.4x heap overflow flaw mailing-list
- 1025959 vdb-entry
- [oss-security] 20110819 Re: CVE request: stunnel 4.4x heap overflow flaw mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=732068
- http://stunnel.org/?page=sdf_ChangeLog
- 49254 vdb-entry
- [stunnel-announce] 20110818 stunnel 4.42 released mailing-list
- 74600 vdb-entry
- 45705 third-party-advisory
- stunnel-unspecifed-code-execution(69318) vdb-entry