CVE-2026-42250
Publication date 28 May 2026
Last updated 1 September 2026
Ubuntu priority
Description
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
Read the notes from the security team
Why is this CVE low priority?
Only a denial of service in a command line utility
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| bzip2 | 26.04 LTS resolute |
Fixed 1.0.8-6ubuntu0.1
|
| 24.04 LTS noble |
Fixed 1.0.8-5.1ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed 1.0.8-5ubuntu0.1
|
|
| 20.04 LTS focal |
Fixed 1.0.8-2ubuntu0.1~esm1
|
|
| 18.04 LTS bionic |
Fixed 1.0.6-8.1ubuntu0.2+esm1
|
|
| 16.04 LTS xenial |
Fixed 1.0.6-8ubuntu0.2+esm1
|
|
| 14.04 LTS trusty |
Fixed 1.0.6-5ubuntu0.1~esm3
|
|
| clamav | 26.04 LTS resolute |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialNotes
alexmurray
clamav has a vendored copy of bzip2 which is used by the nulsft/nsis scanner
mdeslaur
clamav doesn't ship the bzip2recover utility This issue is only a possible denial of service in the bzip2recover command-line utility
Severity score breakdown
CVSS version: CVSS v4.0
Base score
4.8 · Medium
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8685-1
- bzip2 vulnerability
- 27 August 2026