Red Hat Security Advisory: libarchive security update
Affects Red Hat libarchiveSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High.
Data as of 6 Nov 2026, 02:18 UTC
Sources agree
| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 7.5 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libarchive | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportlibarchive | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportlibarchive | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libarchive | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.2 Advanced Update Supportlibarchive | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibarchive | Affected– | Fixed in– |
AI-suggested
Red Hat has released updated libarchive packages (version 3.5.3-9.el9_7) that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 should apply the security update as detailed in Red Hat Advisory RHSA-2026:8510. No additional mitigation steps are indicated beyond applying the official patch.
Description
Two security vulnerabilities have been identified in the libarchive library used by Red Hat Enterprise Linux 9. These include an information disclosure flaw caused by a heap out-of-bounds read in RAR archive processing (CVE-2026-4424) and an arbitrary code execution vulnerability due to an integer overflow in ISO9660 image processing (CVE-2026-5121). Red Hat has released an important security update addressing these issues in libarchive version 3.5.3-9.el9_7 for multiple architectures and variants of Red Hat Enterprise Linux 9.
References
- access.redhat.com/errata/RHSA-2026:8510 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2449006 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2452945 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_8510.json (opens in a new tab)