Integer Overflow or Wraparound Affecting jq-debugsource package, versions <0:1.8.1-59.amzn2023


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-AMZN2023-JQDEBUGSOURCE-17289028
  • published10 Jun 2026
  • disclosed11 May 2026

Introduced: 11 May 2026

CVE-2026-43894  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 jq-debugsource to version 0:1.8.1-59.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1815.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jq-debugsource package and not the jq-debugsource package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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).

CVSS Base Scores

version 3.1