DEBIAN-CVE-2026-54904
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-54904
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54904.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-54904
- Upstream
- Published
- 2026-06-24T17:17:29Z
- Modified
- 2026-09-01T16:06:51Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::AtomicReference#update can enter a permanent busy retry loop when the current value is Float::NAN. The issue is caused by the interaction between AtomicReference#update, which retries until compare_and_set(old_value, new_value) succeeds; Numeric compare_and_set, which checks old == old_value before attempting the underlying atomic swap.; and Ruby NaN semantics, where Float::NAN == Float::NAN is always false. As a result, once an AtomicReference contains Float::NAN, calling #update repeatedly evaluates the caller's block and never returns. In services that store externally derived numeric values in an AtomicReference, this can cause CPU exhaustion or permanent request/job hangs. This vulnerability is fixed in 1.3.7.
- References
Affected packages
Debian:12 / ruby-concurrent
Package
- Name
- ruby-concurrent
- Purl
- pkg:deb/debian/ruby-concurrent?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / ruby-concurrent
Package
- Name
- ruby-concurrent
- Purl
- pkg:deb/debian/ruby-concurrent?arch=source&distro=trixie
Debian:14 / ruby-concurrent
Package
- Name
- ruby-concurrent
- Purl
- pkg:deb/debian/ruby-concurrent?arch=source&distro=forky