DEBIAN-CVE-2020-24240
- Source
- https://security-tracker.debian.org/tracker/CVE-2020-24240
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2020-24240.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2020-24240
- Upstream
- Published
- 2020-08-25T14:15:16Z
- Modified
- 2026-09-01T16:04:59Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.
- References
Affected packages
Debian:12 / bison
Package
- Name
- bison
- Purl
- pkg:deb/debian/bison?arch=source&distro=bookworm
Debian:13 / bison
Package
- Name
- bison
- Purl
- pkg:deb/debian/bison?arch=source&distro=trixie
Debian:14 / bison
Package
- Name
- bison
- Purl
- pkg:deb/debian/bison?arch=source&distro=forky