SB2026042922 - Ubuntu update for ujson

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2026-32874)

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to missing release of memory after effective lifetime in the JSON parser when parsing large integer values in untrusted JSON input. A remote attacker can send a specially crafted JSON payload containing large integers to cause a denial of service.

The issue is triggered for integers outside the range [-2^63, 2^64 - 1], and the leak occurs even if parsing fails because the integer exceeds sys.get_int_max_str_digits().

2) Integer overflow (CVE-ID: CVE-2026-32875)

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer overflow or underflow in ujson.dumps() indentation handling when processing user-controlled indent values during JSON serialization of nested input. A remote attacker can supply a specially crafted indent value to cause a denial of service.

The issue can result in a segmentation fault when the indent value and nesting depth exceed INT32_MAX, or an infinite loop when a large negative indent is used.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-8219-1