CVE-2024-45193
An issue was discovered in Matrix libolm (aka Olm) through 3.2.16. There is Ed25519 signature...
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
CVE-2024-45193- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-327
- Updated
- 2026-11-02
EUVDEUVD-2024-41369
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
EUVD-2024-41369- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w58g-789j-fj58 No score
An issue was discovered in Matrix libolm (aka Olm) through 3.2.16. There is Ed25519 signature...
An issue was discovered in Matrix libolm (aka Olm) through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
GHSA-w58g-789j-fj58- Updated
- 2026-11-02
NVD
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
CVE-2024-45193- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-327
- Updated
- 2026-11-02
OSV
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
CVE-2024-45193- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2024-45193
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
DEBIAN-CVE-2024-45193- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2024-45193
An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- Record
UBUNTU-CVE-2024-45193- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
olmDebian:12 |
All versions, plus listed versions 3.2.13~dfsg-13.2.15~dfsg-13.2.16+dfsg-13.2.16+dfsg-23.2.16+dfsg-33.2.16+dfsg-43.2.16+dfsg-53.2.16+dfsg-6 |
None known |
olmDebian:13 |
All versions, plus listed versions 3.2.16+dfsg-33.2.16+dfsg-43.2.16+dfsg-53.2.16+dfsg-6 |
None known |
olmDebian:14 |
All versions, plus listed versions 3.2.16+dfsg-33.2.16+dfsg-43.2.16+dfsg-53.2.16+dfsg-6 |
None known |
olmUbuntu:18.04:LTS |
All versions, plus listed versions 2.2.2+git20170526.0fd768e+dfsg-1 |
None known |
olmUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 3.1.3+dfsg-23.1.3+dfsg-2build13.1.3+dfsg-2build23.1.3+dfsg-2ubuntu0.1~esm1 |
None known |
olmUbuntu:22.04:LTS |
All versions, plus listed versions 3.2.1~dfsg-7ubuntu23.2.1~dfsg-7ubuntu33.2.10~dfsg-4ubuntu13.2.10~dfsg-5ubuntu13.2.10~dfsg-6ubuntu1 |
None known |
olmUbuntu:24.04:LTS |
All versions, plus listed versions 3.2.13~dfsg-1ubuntu13.2.15~dfsg-1ubuntu13.2.16+dfsg-2 |
None known |
olmUbuntu:25.10 |
All versions, plus listed versions 3.2.16+dfsg-3 |
None known |
olmUbuntu:26.10 |
All versions, plus listed versions 3.2.16+dfsg-53.2.16+dfsg-6 |
None known |
olmUbuntu:26.04:LTS |
All versions, plus listed versions 3.2.16+dfsg-33.2.16+dfsg-5 |
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-2024-45193 is a medium vulnerability (CVSS 4.3) in Matrix Olm, published August 22, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.