Upstream information
Description
concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used for the read hold count, and bit 15 is used as WRITE_LOCK_HELD. After 32,768 reentrant read acquisitions, the local read count crosses into the write-lock bit. try_write_lock then treats the thread as already holding a write lock and returns true without setting the global RUNNING_WRITER bit. This breaks the core mutual-exclusion guarantee: the caller is told it has a write lock, but other threads can still hold or acquire read locks at the same time. This vulnerability is fixed in 1.3.7.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | National Vulnerability Database | SUSE |
|---|---|---|
| Base Score | 5.5 | 5.3 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | None |
| User Interaction | None | Required |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | Low |
| Integrity Impact | None | Low |
| Availability Impact | None | Low |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (GitHub) |
|---|---|
| Base Score | 2 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| Attack Vector | Local |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | Low |
| Vulnerable System Availability Impact | Low |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP7 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP7 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP7 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 16.0 | hawk2 | Affected |
| SUSE Linux Enterprise High Availability Extension 16.1 | hawk2 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP7 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP7 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | hawk2 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | hawk2 | Affected |
| openSUSE Leap 16.0 | hawk2 | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 12 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP5 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP5 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP6 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | rmt-server | Affected |
| SUSE Manager Proxy 4.3 | rmt-server | Affected |
| SUSE Manager Proxy LTS 4.3 | rmt-server | Affected |
| SUSE Manager Retail Branch Server 4.3 | rmt-server | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | rmt-server | Affected |
| SUSE Manager Server 4.3 | rmt-server | Affected |
| SUSE Manager Server LTS 4.3 | rmt-server | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | rmt-server | Affected |
| SUSE Enterprise Storage 6 | rmt-server | Affected |
| SUSE Enterprise Storage 7 | rmt-server | Affected |
| SUSE Enterprise Storage 7.1 | rmt-server | Affected |
| SUSE Linux Enterprise High Availability Extension 12 SP4 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | rubygem-rack | Ignore |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | rmt-server | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | rubygem-concurrent-ruby | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP1 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP1 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | rmt-server | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | rmt-server | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | rmt-server | Affected |
| SUSE Manager Proxy 4.0 | rmt-server | Affected |
| SUSE Manager Proxy 4.1 | rmt-server | Affected |
| SUSE Manager Proxy 4.2 | rmt-server | Affected |
| SUSE Manager Retail Branch Server 4.0 | rmt-server | Affected |
| SUSE Manager Retail Branch Server 4.1 | rmt-server | Affected |
| SUSE Manager Retail Branch Server 4.2 | rmt-server | Affected |
| SUSE Manager Server 4.0 | rmt-server | Affected |
| SUSE Manager Server 4.1 | rmt-server | Affected |
| SUSE Manager Server 4.2 | rmt-server | Affected |
| openSUSE Leap 15.3 | hawk2 | Not affected |
| openSUSE Leap 15.3 | rmt-server | Affected |
| openSUSE Leap 15.3 | rubygem-concurrent-ruby | Affected |
| openSUSE Leap 15.3 | rubygem-rack | Ignore |
| openSUSE Leap 15.4 | hawk2 | Not affected |
| openSUSE Leap 15.4 | rmt-server | Affected |
| openSUSE Leap 15.4 | rubygem-concurrent-ruby | Affected |
| openSUSE Leap 15.4 | rubygem-rack | Ignore |
| openSUSE Leap 15.5 | hawk2 | Not affected |
| openSUSE Leap 15.5 | rmt-server | Affected |
| openSUSE Leap 15.5 | rubygem-concurrent-ruby | Affected |
| openSUSE Leap 15.5 | rubygem-rack | Ignore |
| openSUSE Leap 15.6 | hawk2 | Not affected |
| openSUSE Leap 15.6 | rmt-server | Affected |
| openSUSE Leap 15.6 | rubygem-concurrent-ruby | Affected |
| openSUSE Leap 15.6 | rubygem-rack | Ignore |
| Container Status | ||
| suse/rmt-server | rmt-server | Affected |
SUSE Timeline for this CVE
CVE page created: Sat Jun 20 00:03:10 2026CVE page last modified: Tue Jun 30 17:05:49 2026