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Ubuntu libsoup Update Fixes a Memory Leak in the Cookie Jar

Ubuntu libsoup Update Fixes a Memory Leak in the Cookie Jar

Linuxsecurity •LinuxSecurity Advisories • November 9, 2026

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USN-8890-1 introduced a regression in libsoup Software Description: - libsoup3: HTTP client/server library for GNOME Details: USN-8890-1 fixed vulnerabilities in libsoup. Unfortunately, that update introduced a memory leak in the cookie jar and could introduce a regression. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that libsoup incorrectly handled certain HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-4271) It was discovered that libsoup incorrectly handled certain HTTPS proxy connections. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119) It was discovered that libsoup incorrectly parsed certain chunked HTTP requests. A remote attacker could pos... Read the Full Advisory

USN-8890-1 introduced a regression in libsoup

Software Description:

- libsoup3: HTTP client/server library for GNOME

USN-8890-1 fixed vulnerabilities in libsoup. Unfortunately, that update

introduced a memory leak in the cookie jar and could introduce a

regression. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that libsoup incorrectly handled certain HTTP/2

requests. A remote attacker could possibly use this issue to cause a

denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu

26.04 LTS. (CVE-2026-4271)

It was discovered that libsoup incorrectly handled certain HTTPS proxy

connections. A remote attacker could possibly use this issue to obtain

sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu

24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119)

It was discovered that libsoup incorrectly parsed certain chunked HTTP

requests. A remote attacker could pos...

The problem can be corrected by updating your system to the following package versions: Ubuntu 26.10 gir1.2-soup-3.0 3.6.6-1ubuntu3.2 libsoup-3.0-0 3.6.6-1ubuntu3.2 libsoup-3.0-common 3.6.6-1ubuntu3.2 libsoup-3.0-dev 3.6.6-1ubuntu3.2 Ubuntu 26.04 LTS gir1.2-soup-3.0 3.6.6-1ubuntu0.3 libsoup-3.0-0 3.6.6-1ubuntu0.3 libsoup-3.0-common 3.6.6-1ubuntu0.3 libsoup-3.0-dev 3.6.6-1ubuntu0.3 Ubuntu 24.04 LTS gir1.2-soup-3.0 3.4.4-5ubuntu0.11 libsoup-3.0-0 3.4.4-5ubuntu0.11 libsoup-3.0-common 3.4.4-5ubuntu0.11 libsoup-3.0-dev 3.4.4-5ubuntu0.11 In general, a standard system update will make all the necessary changes.

Ubuntu Security Notice USN-8890-3

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