CVE catalog
CVE-2020-10933
ALPINE-CVE-2020-10933
- Severity
- Medium · CVSS 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 2.53% · Oct 25, 2026
An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Alpine | ruby | 3.10 | 2.5.8-r0 | fixed |
| Alpine | ruby | 3.11 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.12 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.13 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.14 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.15 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.16 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.17 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.18 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.19 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.20 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.21 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.22 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.23 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.24 | 2.6.6-r0 | fixed |
| Alpine | ruby | 3.8 | 2.5.8-r0 | fixed |
| Alpine | ruby | 3.9 | 2.5.8-r0 | fixed |
| Debian | ruby2.7 | 11 | 2.7.1-1 | fixed |
| Ubuntu | ruby2.5 | 18.04 | 2.5.0~preview1-1ubuntu2 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.0-4ubuntu1 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.0-4ubuntu4 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.0-5ubuntu1 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.0-6ubuntu1 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.1 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.2 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.4 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.5 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.6 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.7 | vulnerable |
| Ubuntu | ruby2.5 | 18.04 | 2.5.1-1ubuntu1.8 | fixed |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-1 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-2 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-3 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-4 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-4ubuntu1 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-5ubuntu1 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-5ubuntu1.1 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-5ubuntu1.2 | vulnerable |
| Ubuntu | ruby2.7 | 20.04 | 2.7.0-5ubuntu1.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Alpine | ruby | apk | 3.10 | 2.5.8-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.11 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.12 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.13 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.14 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.15 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.16 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.17 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.18 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.19 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.20 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.21 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.22 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.23 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.24 | 2.6.6-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.8 | 2.5.8-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Alpine | ruby | apk | 3.9 | 2.5.8-r0 | Not reported | ALPINE-CVE-2020-10933 | Not reported |
| Debian | ruby2.7 | deb | 11 | 2.7.1-1 | Not reported | DEBIAN-CVE-2020-10933 | Not reported |
| Ubuntu | ruby2.5 | deb | 18.04 | 2.5.1-1ubuntu1.8 | Not reported | UBUNTU-CVE-2020-10933 | Not reported |
| Ubuntu | ruby2.7 | deb | 20.04 | 2.7.0-5ubuntu1.3 | Not reported | UBUNTU-CVE-2020-10933 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2021_2587.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2020-10933]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-10933]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-10933]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-10933.json]
[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]