CVE-2021-46179
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of...
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
CVE-2021-46179- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
CVE List No score
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
CVE-2021-46179- Updated
- 2026-11-02
EUVDEUVD-2021-32879 No score
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
EUVD-2021-32879- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8vp9-52j5-ghqw
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of...
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
GHSA-8vp9-52j5-ghqw- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
OSV
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
CVE-2021-46179- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-46179
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
DEBIAN-CVE-2021-46179- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-46179
Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.
- Record
UBUNTU-CVE-2021-46179- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
upx-uclDebian:13 |
before 4.2.2-1 | 4.2.2-1 |
upx-uclDebian:14 |
before 4.2.2-1 | 4.2.2-1 |
upx-uclUbuntu:16.04:LTS |
All versions, plus listed versions 3.91-1 |
None known |
upx-uclUbuntu:18.04:LTS |
All versions, plus listed versions 3.94-23.94-33.94-4 |
None known |
upx-uclUbuntu:20.04:LTS |
All versions, plus listed versions 3.95-23.95-2build1 |
None known |
upx-uclUbuntu:22.04:LTS |
All versions, plus listed versions 3.96-23.96-3 |
None known |
upx-uclUbuntu:24.04:LTS |
All versions, plus listed versions 3.96-34.2.2-3 |
None known |
upx-uclUbuntu:25.10 |
All versions, plus listed versions 4.2.4-14.2.4-1.1 |
None known |
upx-uclUbuntu:26.10 |
All versions, plus listed versions 4.2.4-1.1build1 |
None known |
upx-uclUbuntu:26.04:LTS |
All versions, plus listed versions 4.2.4-1.14.2.4-1.1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-46179 is a medium vulnerability (CVSS 6.5) in Upx, published August 22, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. Fixed in upx-ucl 4.2.2-1.