Summary
Cameron Criswell discovered that UltraJSON contained a memory leak
that would occur when parsing large integers. An attacker could
possibly use this issue to cause UltraJSON to crash, resulting in a
denial of service. This issue only affected Ubuntu 24.04 LTS,
Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-32874)
It was discovered that UltraJSON contained integer overflow/underflow
issues when calculating how much memory to reserve for indentation in
certain instances. An attacker could possibly use this issue to cause
UltraJSON to crash, resulting in a denial of service. (CVE-2026-32875)
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 25.10 | ujson | 5.10.0-1ubuntu0.1 |
| Ubuntu · 26.04 LTS 26.04:LTS | ujson | 5.11.0-3ubuntu0.1 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | ujson | 5.1.0-1ubuntu0.1~esm2 |
| Ubuntu · Pro 24.04 LTS Pro:24.04:LTS | ujson | 5.9.0-1ubuntu0.1~esm1 |