ALPINE-CVE-2020-10933
Record from OSV · Published May 4, 2020
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| ruby | Alpine:v3.9 | 2.5.8-r0 |
| ruby | Alpine:v3.21 | 2.6.6-r0 |
| ruby | Alpine:v3.10 | 2.5.8-r0 |
| ruby | Alpine:v3.18 | 2.6.6-r0 |
| ruby | Alpine:v3.19 | 2.6.6-r0 |
| ruby | Alpine:v3.23 | 2.6.6-r0 |
| ruby | Alpine:v3.14 | 2.6.6-r0 |
| ruby | Alpine:v3.20 | 2.6.6-r0 |
| ruby | Alpine:v3.11 | 2.6.6-r0 |
| ruby | Alpine:v3.13 | 2.6.6-r0 |
| ruby | Alpine:v3.15 | 2.6.6-r0 |
| ruby | Alpine:v3.22 | 2.6.6-r0 |
5 more packages have a fixed version. See every fix in Lookup.
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.9 | ruby | 2.4.1-r5, 1.8.7_p174-r2, 1.8.7_p174-r1 |
| Alpine:v3.21 | ruby | 0, 2.5.0 |
| Alpine:v3.10 | ruby | 2.4.1-r3, 0, 1.8.7_p160-r2 |
| Alpine:v3.18 | ruby | 2.4.1-r1, 2.5.0, 1.8.7_p160-r3 |
| Alpine:v3.19 | ruby | 2.0.0_p353-r1, 2.5.0, 2.0.0_p247-r3 |
| Alpine:v3.23 | ruby | 0, 2.5.0 |
| Alpine:v3.14 | ruby | 1.8.7_p174-r2, 1.8.7_p160-r2, 1.8.7_p160-r3 |
| Alpine:v3.20 | ruby | 2.5.0, 0 |
| Alpine:v3.11 | ruby | 1.8.7_p160-r2, 1.8.7_p160-r3, 1.8.7_p174-r0 |
| Alpine:v3.13 | ruby | 1.8.7_p299-r0, 2.5.0, 2.5.1-r0 |
| Alpine:v3.15 | ruby | 0, 1.8.7_p174-r3, 1.8.7_p174-r0 |
| Alpine:v3.22 | ruby | 2.5.0, 0 |
| Alpine:v3.16 | ruby | 1.8.7_p299-r2, 1.8.7_p299-r1, 1.8.7_p299-r0 |
| Alpine:v3.8 | ruby | 2.5.0, 2.2.3-r1, 2.0.0_p247-r1 |
| Alpine:v3.12 | ruby | 2.3.2-r0, 2.5.3-r1, 2.0.0_p353-r0 |
| Alpine:v3.24 | ruby | 2.5.0, 0 |
| Alpine:v3.17 | ruby | 1.8.7_p160-r3, 1.8.7_p174-r0, 1.8.7_p174-r1 |
Timeline
- May 4, 2020 CVE Published
- Aug 5, 2026 CVE Updated
- Aug 8, 2026 Distribution Patch
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