Packages
- ujson - Ultra fast JSON encoder and decoder
Details
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)
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)
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 | python3-ujson – 5.11.0-3ubuntu0.1 | ||
| 25.10 questing | python3-ujson – 5.10.0-1ubuntu0.1 | ||
| 24.04 LTS noble | python3-ujson – 5.9.0-1ubuntu0.1~esm1 | ||
| 22.04 LTS jammy | python3-ujson – 5.1.0-1ubuntu0.1~esm2 | ||
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