CVE-2026-43894
mediumpriority · track · 22EPSS 0.002 · 5 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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
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base score 0–10 · higher = more severe · hover a vector to decode
ssvc
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weaknesses
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affected products (19)
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advisories (2)
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- WID-SEC-W-2026-1384jq: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-05-05csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in jq ausnutzen, um einen Denial of Service Angriff durchzuführen.
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
also known as (3)
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sources
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references (4)
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