CVE-2026-17591
Published: October 17, 2026Last modified: October 20, 2026
Description
A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.6 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libarchive | Vulnerable (3.6.1-r1) |
| 25 LTS | libarchive | Vulnerable (3.8.0-r0) | |
| Stream | libarchive | Fixed (3.8.9-r0) |