DEBIAN-CVE-2026-54906
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-54906
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54906.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-54906
- Upstream
- Published
- 2026-06-24T17:17:29Z
- Modified
- 2026-09-01T16:06:51Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReadWriteLock#release_write_lock does not verify that the calling thread acquired the write lock. Any thread with access to the lock object can release an active write lock held by another thread. A second writer can then enter its critical section while the first writer is still running. Concurrent::ReadWriteLock#release_read_lock also decrements the shared counter even when no read lock is held. Calling it on a fresh lock changes the counter from 0 to -1, after which normal read acquisition raises Concurrent::ResourceLimitError. This is a synchronization correctness issue in the public Concurrent::ReadWriteLock API. 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