Off-by-One Leading to Out-of-Bounds Write in bzip2
CVE-2026-42250 is fixed in 2 products on 1 platform, first by bzip2 1.0.6-8.1ubuntu0.2+esm1, released May 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bzip2 · Ubuntu 18.04.6 LTS (bionic) | 1.0.6-8.1ubuntu0.2+esm1 | bzip2 1.0.6-8.1ubuntu0.2+esm1 | May 28, 2026 |
| bzip2 · Ubuntu 20.04 LTS (focal) | 1.0.8-2ubuntu0.1~esm1 | bzip2 1.0.8-2ubuntu0.1~esm1 | May 28, 2026 |
| bzip2 · Ubuntu 22.04.1 LTS (jammy) | 1.0.8-5ubuntu0.1 | bzip2 1.0.8-5ubuntu0.1 | May 28, 2026 |
| bzip2 · Ubuntu 24.04.5 LTS (noble) | 1.0.8-5.1ubuntu0.1 | bzip2 1.0.8-5.1ubuntu0.1 | May 28, 2026 |
| bzip2 · Ubuntu 26.04.1 LTS (resolute) | 1.0.8-6ubuntu0.1 | bzip2 1.0.8-6ubuntu0.1 | May 28, 2026 |
| bzip2 · opensuse-leap 16.0 | 1.0.8-160000.3.1 | OPENSUSE-SU-2026:21762-1 | Sep 4, 2026 |
| bzip2 · sles 15.7 | 1.0.8-150400.3.4.1 | SUSE-SU-2026:4055-1 | Sep 7, 2026 |
| bzip2 · sles 16.0 | 1.0.8-160000.3.1 | SUSE-SU-2026:23627-1 | Sep 4, 2026 |
| libbz2-1.0 · Ubuntu 18.04.6 LTS (bionic) | 1.0.6-8.1ubuntu0.2+esm1 | libbz2-1.0 1.0.6-8.1ubuntu0.2+esm1 | May 28, 2026 |
| libbz2-1.0 · Ubuntu 20.04 LTS (focal) | 1.0.8-2ubuntu0.1~esm1 | libbz2-1.0 1.0.8-2ubuntu0.1~esm1 | May 28, 2026 |
| libbz2-1.0 · Ubuntu 22.04.1 LTS (jammy) | 1.0.8-5ubuntu0.1 | libbz2-1.0 1.0.8-5ubuntu0.1 | May 28, 2026 |
| libbz2-1.0 · Ubuntu 24.04.5 LTS (noble) | 1.0.8-5.1ubuntu0.1 | libbz2-1.0 1.0.8-5.1ubuntu0.1 | May 28, 2026 |
| libbz2-1.0 · Ubuntu 26.04.1 LTS (resolute) | 1.0.8-6ubuntu0.1 | libbz2-1.0 1.0.8-6ubuntu0.1 | May 28, 2026 |
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