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SCA: security update for concurrent-ruby (GHSA-wv3x-4vxv-whpp)

low Tenable Self-Hosted Container Security Plugin ID 443621

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-54905)

Solution

Update the concurrent-ruby library and its related packages to version 1.3.7 or later.

See Also

https://github.com/advisories/GHSA-wv3x-4vxv-whpp

Plugin Details

Severity: Low

ID: 443621

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 6/20/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2026-54905

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Low

Base Score: 2

Threat Score: 0.4

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2026

Vulnerability Publication Date: 6/19/2026

Reference Information

CVE: CVE-2026-54905

cwe: CWE-128