CVE-2021-38423
GurumDDS Heap-based Incorrect Calculation of Buffer Size
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
GurumDDS Heap-based Incorrect Calculation of Buffer Size
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.
- Record
CVE-2021-38423- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-131
- Updated
- 2026-11-02
EUVDEUVD-2021-24875
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.
- Record
EUVD-2021-24875- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-j9pc-mr89-w3h7
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer,...
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.
- Record
GHSA-j9pc-mr89-w3h7- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-131
- Updated
- 2026-11-02
NVD
All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.
- Record
CVE-2021-38423- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-131
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38423 is a medium vulnerability (CVSS 6.6) in Gurum Gurumdds, published May 5, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. No source names a fixed version.