EUVD-2026-29172CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionNVD
jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes ≈715 million 16-bit units (≈1.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit).
AnalysisAI
Buffer overflow in jq 1.8.1 and earlier allows local attackers to cause denial of service by providing a crafted JSON number literal with INT_MAX-1 (2147483646) digits, triggering integer overflow in the D2U() macro that bypasses heap-allocation checks and writes approximately 1.4 GiB of attacker-controlled data to the stack, corrupting memory far below the stack frame.
Sign in for full analysis, threat intelligence, and remediation guidance.
Vendor StatusVendor
Share
External POC / Exploit Code
Leaving vuln.today