Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package rsync (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2004-RSYNC-14905981
- published9 Jan 2026
- disclosed7 Jan 2026
Introduced: 7 Jan 2026
CVE-2026-22184 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rsync package and not the rsync package as distributed by Ubuntu.
zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2026-22184
- https://github.com/madler/zlib
- https://seclists.org/fulldisclosure/2026/Jan/3
- https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname
- https://zlib.net/
- https://github.com/madler/zlib/issues/1142
- https://access.redhat.com/security/cve/CVE-2026-22184
- https://bugzilla.redhat.com/show_bug.cgi?id=2427688
- https://cert-portal.siemens.com/productcert/html/ssa-470355.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22184.json