ALPINE-CVE-2026-43894
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-43894
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-43894.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-43894
- Upstream
- Published
- 2026-05-11T18:16:37Z
- Modified
- 2026-09-14T16:18:08Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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).
- References
Affected packages
Alpine:v3.22 / jq
Package
- Name
- jq
- Purl
- pkg:apk/alpine/jq?arch=source
Alpine:v3.23 / jq
Package
- Name
- jq
- Purl
- pkg:apk/alpine/jq?arch=source