Description
Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| erlang | otp | >= OTP-27.0.0, < OTP-27.2.4, >= OTP-26.0.0.0, < OTP-26.2.5.9, < OTP-25.3.2.18 | — |
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 | erlang | 1:27.2.4+dfsg-1 | — |
| Debian 13 | erlang | 1:27.2.4+dfsg-1 | — |
| Debian 12 | erlang | 1:25.2.3+dfsg-1+deb12u1 | DSA-5906-1 |
| Debian 11 | erlang | 1:23.2.6+dfsg-1+deb11u2 | DLA-4132-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | erlang | 1:27.3.4.6+dfsg-1ubuntu0.2 | USN-8901-1 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.1 | USN-8901-1, USN-7313-1 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.2 | USN-8901-1, USN-7313-1 |
| Ubuntu 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.3 | USN-7313-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.5+esm3 | USN-8901-1 |
| Ubuntu Pro 18.04 LTS | erlang | 1:20.2.2+dfsg-1ubuntu2+esm4 | USN-8901-1 |
| Ubuntu Pro 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1+esm4 | USN-8901-1 |
| Ubuntu Pro 14.04 LTS | erlang | 1:16.b.3-dfsg-1ubuntu2.2+esm3 | USN-8901-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | erlang | 23.3.4.19-150300.3.17.1 | SUSE-SU-2025:0901-1 |
| SLES 15 SP6 | erlang26 | 26.2.1-150300.7.8.1 | SUSE-SU-2025:1051-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | erlang | 27.2.4-2.1 | openSUSE-SU-2025:14879-1 |
| openSUSE Tumbleweed | erlang27 | 27.1.3-3.1 | openSUSE-SU-2026:11560-1 |
| openSUSE Leap 15.6 | erlang | 23.3.4.19-150300.3.17.1 | SUSE-SU-2025:0901-1 |
| openSUSE Leap 15.6 | erlang26 | 26.2.1-150300.7.8.1 | SUSE-SU-2025:1051-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | erlang | 26.2.5.9-1 | — |
| Azure Linux 2 (CBL-Mariner) | erlang | 25.2-3 | — |
Advisories 9
- USN-8901-1 erlang vulnerabilities Ubuntu Security Notices (USN) · Oct 8, 2026
- WID-SEC-2025-0419 Erlang/OTP: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 24, 2026
- openSUSE-SU-2026:11560-1 erlang27-27.1.3-3.1 on GA media SUSE / openSUSE Security Updates · Aug 21, 2026
- USN-7313-1 erlang vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5906-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4132-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:1051-1 Security update for erlang26 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0901-1 Security update for erlang SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14879-1 erlang-27.2.4-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026