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Alerts This Week
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Ubuntu 25.10: OpenCC Critical Denial of Service Vulnerability USN-7972-1

ubuntu
Calendar Grey January 21, 2026
Scroller Ubuntu
OpenCC issue could crash the application, leading to denial of service on Ubuntu systems. Immediate updates recommended.
OpenCC could be made to crash if it received specially crafted input.

Summary

OpenCC could be made to crash if it received specially crafted input.

Software Description:

- opencc: simplified-traditional Chinese conversion library

Details:

It was discovered that OpenCC incorrectly handled truncated UTF-8 input.

An attacker could possibly use this issue to cause OpenCC to crash,

resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical software update Ubuntu opencc

Update Instructions

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

Ubuntu 25.10
  libopencc1.1                    1.1.9+ds1-2ubuntu0.1
  opencc                          1.1.9+ds1-2ubuntu0.1

Ubuntu 24.04 LTS
  libopencc1.1                    1.1.7+ds1-1ubuntu0.1
  opencc                          1.1.7+ds1-1ubuntu0.1

Ubuntu 22.04 LTS
  libopencc1.1                    1.1.3+ds1-3ubuntu3.1
  opencc                          1.1.3+ds1-3ubuntu3.1

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7972-1

CVE-2025-15536

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7972-1

Topics%20covered

Topics Covered

security advisory denial of service critical software update Ubuntu opencc

Package Information

https://launchpad.net/ubuntu/+source/opencc/1.1.9+ds1-2ubuntu0.1

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