DEBIAN-CVE-2025-62494
- Source
- https://security-tracker.debian.org/tracker/CVE-2025-62494
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-62494.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-62494
- Upstream
- Published
- 2025-10-16T16:15:39Z
- Modified
- 2026-09-01T20:05:55Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
A type confusion vulnerability exists in the handling of the string addition (+) operation within the QuickJS engine. * The code first checks if the left-hand operand is a string. * It then attempts to convert the right-hand operand to a primitive value using JS_ToPrimitiveFree. This conversion can trigger a callback (e.g., toString or valueOf). * During this callback, an attacker can modify the type of the left-hand operand in memory, changing it from a string to a different type (e.g., an object or an array). * The code then proceeds to call JS_ConcatStringInPlace, which still treats the modified left-hand value as a string. This mismatch between the assumed type (string) and the actual type allows an attacker to control the data structure being processed by the concatenation logic, resulting in a type confusion condition. This can lead to out-of-bounds memory access, potentially resulting in memory corruption and arbitrary code execution in the context of the QuickJS runtime.
- References
Affected packages
Debian:13 / quickjs
Package
- Name
- quickjs
- Purl
- pkg:deb/debian/quickjs?arch=source&distro=trixie
Debian:14 / quickjs
Package
- Name
- quickjs
- Purl
- pkg:deb/debian/quickjs?arch=source&distro=forky