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Ubuntu 25.10: Erlang Critical DoS Issue Fix USN-7831-1 CVE-2025-48038

ubuntu
Calendar Grey October 21, 2025
Dist Ubuntu Esm H88
Multiple security issues in Erlang for Ubuntu fixed; updates recommended for stability and protection against DoS.
Several security issues were fixed in Erlang.

Summary

Several security issues were fixed in Erlang.

Software Description:

- erlang: Concurrent, real-time, distributed functional language

Details:

It was discovered that Erlang incorrectly handled resource allocation and

consumption in the SFTP SSH module. An attacker could possibly use this

issue cause Erlang to consume excessive resources, leading to a denial of

service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu resource allocation erlang

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  erlang                          1:27.3.4.1+dfsg-1ubuntu0.1
  erlang-ssh                      1:27.3.4.1+dfsg-1ubuntu0.1

Ubuntu 25.04
  erlang                          1:27.3+dfsg-1ubuntu1.3
  erlang-ssh                      1:27.3+dfsg-1ubuntu1.3

Ubuntu 24.04 LTS
  erlang                          1:25.3.2.8+dfsg-1ubuntu4.5
  erlang-ssh                      1:25.3.2.8+dfsg-1ubuntu4.5

Ubuntu 22.04 LTS
  erlang                          1:24.2.1+dfsg-1ubuntu0.6
  erlang-ssh                      1:24.2.1+dfsg-1ubuntu0.6

Ubuntu 20.04 LTS
  erlang                          1:22.2.7+dfsg-1ubuntu0.5+esm1
                                  Available with Ubuntu Pro
  erlang-ssh                      1:22.2.7+dfsg-1ubuntu0.5+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  erlang                          1:20.2.2+dfsg-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  erlang-ssh                      1:20.2.2+dfsg-1ubuntu2+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  erlang                          1:18.3-dfsg-1ubuntu3.1+esm2
                                  Available with Ubuntu Pro
  erlang-ssh                      1:18.3-dfsg-1ubuntu3.1+esm2
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  erlang                          1:16.b.3-dfsg-1ubuntu2.2+esm1
                                  Available with Ubuntu Pro
  erlang-ssh                      1:16.b.3-dfsg-1ubuntu2.2+esm1
                                  Available with Ubuntu Pro

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

https://ubuntu.com/security/notices/USN-7831-1

CVE-2025-48038, CVE-2025-48039, CVE-2025-48040, CVE-2025-48041

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7831-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu resource allocation erlang

Package Information

https://launchpad.net/ubuntu/+source/erlang/1:27.3.4.1+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/erlang/1:25.3.2.8+dfsg-1ubuntu4.5
https://launchpad.net/ubuntu/+source/erlang/1:24.2.1+dfsg-1ubuntu0.6

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