Integer Overflow or Wraparound Affecting libjq1 package, versions <1.7.1-160000.3.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-SLES1600-LIBJQ1-17978083
  • published15 Jul 2026
  • disclosed7 Jul 2026

Introduced: 7 Jul 2026

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

How to fix?

Upgrade SLES:16.0.0 libjq1 to version 1.7.1-160000.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libjq1 package and not the libjq1 package as distributed by SLES. See How to fix? for SLES:16.0.0 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