DEBIAN-CVE-2026-39979
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-39979
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39979.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-39979
- Upstream
- Published
- 2026-04-13T23:16:27Z
- Modified
- 2026-09-14T17:03:32Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jv_string_fmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jv_parse_sized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f.
- References
Affected packages
Debian:12 / jq
Package
- Name
- jq
- Purl
- pkg:deb/debian/jq?arch=source&distro=bookworm
Debian:13 / jq
Package
- Name
- jq
- Purl
- pkg:deb/debian/jq?arch=source&distro=trixie
Debian:14 / jq
Package
- Name
- jq
- Purl
- pkg:deb/debian/jq?arch=source&distro=forky