SB2026052161 - Ubuntu update for jq

Description

This security bulletin contains information about 6 vulnerabilities.

1) Integer overflow (CVE-ID: CVE-2026-32316)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow in the "jvp_string_append" and "jvp_string_copy_replace_bad" functions. A remote attacker can pass specially crafted data to the application, trigger integer overflow and cause a denial of service condition on the target system.

2) Uncontrolled Recursion (CVE-ID: CVE-2026-33947)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion in the "jv_setpath()", "jv_getpath()" and "delpaths_sorted()" functions in src/jv_aux.c. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

3) Improper Null Termination (CVE-ID: CVE-2026-33948)

CWE-ID: CWE-170 - Improper Null Termination

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to embedded-NUL truncation in jq CLI JSON input path. A remote attacker can cause validation bypass on the system.

4) NULL pointer dereference (CVE-ID: CVE-2026-39956)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to jq _strindices missing runtime type checks. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack or gain access to sensitive information.

5) Out-of-bounds read (CVE-ID: CVE-2026-39979)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Amber

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a boundary condition in the "jv_parse_sized()" function. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

6) Inefficient Algorithmic Complexity (CVE-ID: CVE-2026-40164)

CWE-ID: CWE-407 - Inefficient Algorithmic Complexity

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to inefficient algorithmic complexity within hardcoded MurmurHash3 seed. A remote attacker can cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-8202-3