Description
Use-after-free in libtransmission/variant.c in Transmission before 3.00 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted torrent file.
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 | transmission | 3.00-1 | — |
| Debian 13 | transmission | 3.00-1 | — |
| Debian 12 | transmission | 3.00-1 | — |
| Debian 9 | transmission | 2.92-2+deb9u2 | DLA-2305-1 |
| Debian 8 | transmission | 2.84-0.2+deb8u2 | DLA-2218-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | transmission | No fix yet | — |
| Ubuntu 18.04 LTS | transmission | No fix yet | — |
| Ubuntu 16.04 LTS | transmission | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | transmission | 3.00-r0 | — |
| Alpine v3.23 | transmission | 3.00-r0 | — |
| Alpine v3.22 | transmission | 3.00-r0 | — |
| Alpine v3.21 | transmission | 3.00-r0 | — |
| Alpine v3.20 | transmission | 3.00-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | transmission | 3.00-r0 | — |
| Alpine v3.18 | transmission | 3.00-r0 | — |
| Alpine v3.17 | transmission | 3.00-r0 | — |
| Alpine v3.16 | transmission | 3.00-r0 | — |
| Alpine v3.15 | transmission | 3.00-r0 | — |
| Alpine v3.14 | transmission | 3.00-r0 | — |
| Alpine v3.13 | transmission | 3.00-r0 | — |
| Alpine v3.12 | transmission | 3.00-r0 | — |
Advisories 2
- DLA-2305-1 transmission - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2218-1 transmission - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/transmission/transmission/commit/2123adf8e5e1c2b48791f9d22fc8c747e974180e
- https://tomrichards.net/2020/05/cve-2018-10756-transmission/
- FEDORA-2020-e67318b4b4 vendor-advisory
- [debian-lts-announce] 20200524 [SECURITY] [DLA 2218-1] transmission security update mailing-list
- FEDORA-2020-3ef028d53f vendor-advisory
- GLSA-202007-07 vendor-advisory
- [debian-lts-announce] 20200801 [SECURITY] [DLA 2305-1] transmission security update mailing-list