High
zsync — security advisory
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.
- Products
- zsync
- Affected versions
- 0.6.2-1ubuntu1, 0.6.2-2ubuntu1, 0.6.2-3ubuntu1, 0.6.2-5, 0.6.2-5build1, 0.6.2-7ubuntu1, 0.6.2-8, 0.6.2-9, 0.6.3-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-22184
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:18 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-22184
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
zsync
Fixed versions: Not specified
Complete source record
{
"id": "94adb5e17bfd19b9f2e895152899e1df49d4011ba15b644f715567b24d21c096",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-22184",
"method": "structured",
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"title": "UBUNTU-CVE-2026-22184",
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"modified": "2026-10-27T04:17:50.599192108Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-22184",
"https://www.cve.org/CVERecord?id=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/"
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"source_id": "core-osv",
"document_id": 460300,
"published_at": "2026-01-07T21:16:00+00:00"
}