CVE-2026-41257
jq: Signed-int overflow in `stack_reallocate` (jq VM stack)
Description
jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM's data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:RUser InteractionRequired
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Exploitability
Workaround Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
2 techniques Initial Access
Privilege Escalation
References
Timeline
Published
May 11, 2026
Last Updated
May 13, 2026
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