CVE-2021-39514
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the...
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
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
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
CVE-2021-39514- 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 - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-697
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
CVE-2021-39514- Updated
- 2026-11-02
EUVDEUVD-2021-25871 No score
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
EUVD-2021-25871- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h37c-4pg2-6xq6 No score
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the...
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
GHSA-h37c-4pg2-6xq6- Weakness
- CWE-697
- Updated
- 2026-11-02
OSV
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
CVE-2021-39514- 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-2021-39514
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
DEBIAN-CVE-2021-39514- 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-2021-39514
An issue was discovered in libjpeg through 2020021. An uncaught floating point exception in the function ACLosslessScan::ParseMCU() located in aclosslessscan.cpp. It allows an attacker to cause Denial of Service.
- Record
UBUNTU-CVE-2021-39514- 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 |
|---|---|---|
libjpegDebian:12 |
before 0.0~git20200925.f145908-1 | 0.0~git20200925.f145908-1 |
libjpegDebian:13 |
before 0.0~git20200925.f145908-1 | 0.0~git20200925.f145908-1 |
libjpegDebian:14 |
before 0.0~git20200925.f145908-1 | 0.0~git20200925.f145908-1 |
libjpeg6bUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1:6b2-21:6b2-2ubuntu0.1~esm1 |
None known |
libjpegUbuntu:20.04:LTS |
All versions, plus listed versions 0.0~git20190821.87636f3b26b4-10.0~git20190821.87636f3b26b4-1.1 |
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-2021-39514 is a medium vulnerability (CVSS 6.5) in Jpeg Libjpeg, published September 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.85%, the 58th percentile. Fixed in libjpeg 0.0~git20200925.f145908-1.