CVE-2026-22184
Published: July 1, 2026
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.
CRITICAL
CVSS v3: 9.8
CVSS v3: 9.8
Status
| DocFilters Release | Package | State | Justification | Comment |
|---|---|---|---|---|
| 0.0.0.1 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 25.4 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 25.3 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 25.2 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 25.1.1 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 25.1 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.4 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.4.0 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.3 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.2.1 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.2 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 24.1 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 23.3 | zlib (1.3) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 23.2.1 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 23.2 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 23.1 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 22.4 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 22.3 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 22.2 | zlib (1.2.12) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 22.1 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.11.1 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.11 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.8.1 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.8 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.5.1 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.5.0 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 21.2.0 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.20 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.19.3667 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.18.3599 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.17 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.16.3445 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.15.3368 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.14.3263 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.13.3179 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.12.3054 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.11.3040 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.11.2990 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.10.2934 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.9.2878 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
| 11.4.8.2822 | zlib (1.2.11) | Not Affected | Code Not Present | Document Filters only builds zlib core sources and contrib/infback9; the vulnerable contrib/untgz utility is absent from our source tree and never shipped. |
Severity score breakdown
Attack Complexity
LOW
Attack Vector
NETWORK
Availability Impact
HIGH
Base Score
9.8
Base Severity
CRITICAL
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Privileges Required
NONE
Scope
UNCHANGED
User Interaction
NONE
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version
3.1