========================================================================== Ubuntu Security Notice USN-8229-1 May 04, 2026
sed vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: sed could be made to overwrite files. Software Description: - sed: GNU stream editor for filtering/transforming text Details: Michał Majchrowicz and Marcin Wyczechowski discovered that sed incorrectly handled symbolic links when performing in-place edits. A local attacker could possibly use this issue to overwrite arbitrary files. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS sed 4.9-2ubuntu1 Ubuntu 25.10 sed 4.9-2ubuntu0.25.10.1 Ubuntu 24.04 LTS sed 4.9-2ubuntu0.24.04.1 Ubuntu 22.04 LTS sed 4.8-1ubuntu2.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8229-1 CVE-2026-5958 Package Information: https://launchpad.net/ubuntu/+source/sed/4.9-2ubuntu1 https://launchpad.net/ubuntu/+source/sed/4.9-2ubuntu0.25.10.1 https://launchpad.net/ubuntu/+source/sed/4.9-2ubuntu0.24.04.1 https://launchpad.net/ubuntu/+source/sed/4.8-1ubuntu2.1
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