libnetty-java: The Snappy frame decoder function doesn't restrict the chunk length whichmay lead to excessive memory usage
CVE-2021-37137 is fixed in 2 products on 1 platform, first by RLSA-2022:8506, released November 16, 2022. It is not reported as exploited. Patch Radar priority: Routine.
The Snappy frame decoder function doesn't restrict the chunk length whichmay lead to excessive memory usage. Beside this it also may buffer reservedskippable chunks until the whole chunk was received which may lead toexcessive memory usage as well. This vulnerability can be triggered bysupplying malicious input that decompresses to a very big size (via anetwork stream or a file) or by sending a huge skippable chunk.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libdb · rocky 8 | 0:5.3.28-42.el8_4 | RLSA-2022:8506 | Nov 16, 2022 |
| libnetty-java · Ubuntu 18.04.6 LTS (bionic) | 1:4.1.7-4ubuntu0.1+esm2 | libnetty-java 1:4.1.7-4ubuntu0.1+esm2 | Dec 12, 2022 |
| libnetty-java · Ubuntu 20.04 LTS (focal) | 1:4.1.45-1ubuntu0.1~esm1 | libnetty-java 1:4.1.45-1ubuntu0.1~esm1 | Dec 12, 2022 |
| libnetty-java · Ubuntu 22.04.1 LTS (jammy) | 1:4.1.48-4+deb11u1build0.22.04.1 | libnetty-java 1:4.1.48-4+deb11u1build0.22.04.1 | Dec 12, 2022 |
| libnetty-java · Ubuntu 24.10 (oracular) | 4.1.48-6 | libnetty-java 4.1.48-6 | Jan 16, 2026 |
| libnetty-java · Ubuntu 25.04 (plucky) | 4.1.48-6 | libnetty-java 4.1.48-6 | Jan 16, 2026 |
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