An issue was discovered in the Shannon RCS component in Samsung Exynos Modem 5123 and…
Priority LOW 39CWE-669Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
An issue was discovered in the Shannon RCS component in Samsung Exynos Modem 5123 and 5300. Incorrect resource transfer between spheres can cause changes to the activation mode of RCS via a crafted application.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00486 42nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:samsung:exynos_5123_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Samsung |
| cpe:2.3:h:samsung:exynos_5123:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Samsung |
| cpe:2.3:o:samsung:exynos_5300_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Samsung |
| cpe:2.3:h:samsung:exynos_5300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Samsung |
- cpe:2.3:o:samsung:exynos_5123_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Samsung
- cpe:2.3:h:samsung:exynos_5123:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Samsung
- cpe:2.3:o:samsung:exynos_5300_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Samsung
- cpe:2.3:h:samsung:exynos_5300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Samsung
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-31115
- 2026-10-03 Alias added: GHSA-q539-3f98-vmmm
References
More Samsung Exynos 5123 Firmware vulnerabilities
- TI-2023-14831 An issue was discovered in the Shannon RCS component in Samsung Exynos Modem 5123 and… CVSS 3.1CRITICAL 9.8
- TI-2023-14829 An issue was discovered in the Shannon RCS component in Samsung Exynos Modem 5123 and… CVSS 3.1CRITICAL 9.1
- TI-2023-13533 An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and… CVSS 3.1HIGH 7.5
- TI-2023-13532 An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and… CVSS 3.1HIGH 7.5
- TI-2023-13531 An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and… CVSS 3.1HIGH 7.5
- TI-2023-13530 An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and… CVSS 3.1HIGH 7.5
Sources
- CVE-2023-31115 · CVE Program
- CVE-2023-31115 · NVD
- FIRST EPSS
- GHSA-q539-3f98-vmmm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences