USN-8827-1 release notes and known issues

Summary

It was discovered that the Erlang Port Mapper Daemon did not properly handle slow connections. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-42792) It was discovered that Erlang incorrectly handled certain external term format data, leading to heap corruption. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-55737) It was discovered that Erlang incorrectly handled invalid external term format data. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-54890) It was discovered that Erlang incorrectly handled certain packet lengths, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code. (CVE-2026-75538) It was discovered that the Erlang Megaco flex scanner incorrectly handled certain input, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code. (CVE-2026-59250) It was discovered that Erlang TLS clients incorrectly accepted cipher suites that they had not offered. A remote attacker could possibly use this issue to intercept and modify TLS communications. (CVE-2026-55953) It was discovered that Erlang incorrectly handled certain certificate chains. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58227) It was discovered that Erlang incorrectly handled certain certificate policies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-59251) It was discovered that the Erlang HTTP server incorrectly handled certain conflicting HTTP framing headers. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-23941, CVE-2026-73812) It was discovered that the Erlang HTTP server incorrectly handled certain malformed chunk sizes. A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. (CVE-2026-69664) It was discovered that the Erlang HTTP server did not properly limit the size of chunked request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-74835) It was discovered that the Erlang HTTP server incorrectly handled certain equivalent request paths and differences in character case. A remote attacker could possibly use this issue to bypass authentication and gain unauthorized access. (CVE-2026-66835, CVE-2026-73270) It was discovered that the Erlang HTTP server did not properly limit simultaneous connections. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-70399) It was discovered that the Erlang HTTP server incorrectly handled header continuation lines. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-66357) It was discovered that the Erlang HTTP server incorrectly handled certain malformed header names. A remote attacker could possibly use this issue to smuggle HTTP requests. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-73276) It was discovered that the Erlang HTTP server incorrectly handled incomplete request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-7138

Improvements and security content

• It was discovered that the Erlang Port Mapper Daemon did not properly handle slow connections. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-42792) It was discovered that Erlang incorrectly handled certain external term format data, leading to heap corruption. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-55737) It was discovered that Erlang incorrectly handled invalid external term format data. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-54890) It was discovered that Erlang incorrectly handled certain packet lengths, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code. (CVE-2026-75538) It was discovered that the Erlang Megaco flex scanner incorrectly handled certain input, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code. (CVE-2026-59250) It was discovered that Erlang TLS clients incorrectly accepted cipher suites that they had not offered. A remote attacker could possibly use this issue to intercept and modify TLS communications. (CVE-2026-55953) It was discovered that Erlang incorrectly handled certain certificate chains. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58227) It was discovered that Erlang incorrectly handled certain certificate policies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-59251) It was discovered that the Erlang HTTP server incorrectly handled certain conflicting HTTP framing headers. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-23941, CVE-2026-73812) It was discovered that the Erlang HTTP server incorrectly handled certain malformed chunk sizes. A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. (CVE-2026-69664) It was discovered that the Erlang HTTP server did not properly limit the size of chunked request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-74835) It was discovered that the Erlang HTTP server incorrectly handled certain equivalent request paths and differences in character case. A remote attacker could possibly use this issue to bypass authentication and gain unauthorized access. (CVE-2026-66835, CVE-2026-73270) It was discovered that the Erlang HTTP server did not properly limit simultaneous connections. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-70399) It was discovered that the Erlang HTTP server incorrectly handled header continuation lines. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-66357) It was discovered that the Erlang HTTP server incorrectly handled certain malformed header names. A remote attacker could possibly use this issue to smuggle HTTP requests. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-73276) It was discovered that the Erlang HTTP server incorrectly handled incomplete request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-7138

Affected products and versions

Recommended action

Review the official publisher document before deployment.

Lifecycle connections

These links connect the publisher update to related Lifecycle records without treating the update publication date as an end-of-support date.

Official publisher evidence