CVE-2026-4424
Publication date 19 March 2026
Last updated 22 May 2026
Ubuntu priority
Description
A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libarchive | 26.04 LTS resolute |
Fixed in 3.8.5-1ubuntu2.1
|
| 24.04 LTS noble |
Fixed in 3.7.2-2ubuntu0.7
|
|
| 22.04 LTS jammy |
Fixed in 3.6.0-1ubuntu1.7
|
|
| 20.04 LTS focal |
Fixed in 3.4.0-2ubuntu1.5+esm2
|
|
| 18.04 LTS bionic |
Fixed in 3.2.2-3.1ubuntu0.7+esm3
|
|
| 16.04 LTS xenial |
Fixed in 3.1.2-11ubuntu0.16.04.8+esm3
|
|
| 14.04 LTS trusty |
Fixed in 3.1.2-7ubuntu2.8+esm5
|
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CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8292-1
- libarchive vulnerabilities
- 21 May 2026