CVE-2026-17591
Libarchive: libarchive: use-after-free via aliased mac metadata copy
- State
- Published
- Severity
- 3.6 Low
- Published
- Oct 16, 2026
- Updated
- Oct 19, 2026
- Reserved
- Jul 27, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.6 Low | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L | redhat |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
Red Hat Hardened ImagesRed Hat |
|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat |
References
- RHSA-2026:77775vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-17591vdb-entry
- RHBZ#2554209issue-tracking
- https://github.com/libarchive/libarchive/pull/3318
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