Packages
- nano - GNU nano editor
Details
Michał Majchrowicz and Marcin Wyczechowski discovered that Nano created
the ~/.local directory with incorrect permissions. In environments with
permissive umask settings, a local attacker could possibly use this
issue to inject a malicious launcher file, resulting in information
disclosure or other unintended actions. (CVE-2026-6842)
Michał Majchrowicz and Marcin Wyczechowski discovered that Nano
incorrectly handled directory names when updating the status line. A
local attacker could possibly use this issue to cause Nano to crash,
resulting in a denial of service. This issue only affected Ubuntu 22.04
LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS.
(CVE-2026-6843)
Michał Majchrowicz and Marcin Wyczechowski discovered that Nano created
the ~/.local directory with incorrect permissions. In environments with
permissive umask settings, a local attacker could possibly use this
issue to inject a malicious launcher file, resulting in information
disclosure or other unintended actions. (CVE-2026-6842)
Michał Majchrowicz and Marcin Wyczechowski discovered that Nano
incorrectly handled directory names when updating the status line. A
local attacker could possibly use this issue to cause Nano to crash,
resulting in a denial of service. This issue only affected Ubuntu 22.04
LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS.
(CVE-2026-6843)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | nano – 8.7.1-1ubuntu0.1 | ||
| nano-tiny – 8.7.1-1ubuntu0.1 | |||
| 25.10 questing | nano – 8.4-1ubuntu0.1 | ||
| nano-tiny – 8.4-1ubuntu0.1 | |||
| 24.04 LTS noble | nano – 7.2-2ubuntu0.2 | ||
| nano-tiny – 7.2-2ubuntu0.2 | |||
| 22.04 LTS jammy | nano – 6.2-1ubuntu0.2 | ||
| nano-tiny – 6.2-1ubuntu0.2 | |||
| 20.04 LTS focal | nano – 4.8-1ubuntu1.1+esm1 | ||
| nano-tiny – 4.8-1ubuntu1.1+esm1 | |||
| 18.04 LTS bionic | nano – 2.9.3-2ubuntu0.1~esm2 | ||
| nano-tiny – 2.9.3-2ubuntu0.1~esm2 | |||
Reduce your security exposure
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