CVE-2026-17591
Libarchive: libarchive: use-after-free via aliased mac metadata copy
CVSS Score
3.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | red hat |
| Product | red hat hardened images |
| Published | Oct 16, 2026 |
| Last Updated | Oct 17, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat hardened images
Be the first to know when new low vulnerabilities affecting red hat red hat hardened images are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low
Affected Versions
Red Hat / Red Hat Hardened Images
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
Credits
Red Hat would like to thank shaohan.X for reporting this issue.