Out-of-bounds Write in UFS Firmware
CVSS score
8.8
EPSS probability
—
Risk score
0.9
Published
2 h ago
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Impact on My Inventory
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
An out-of-bounds write vulnerability exists in the UFS Field Firmware Update (FFU) functionality of Unisoc Storage due to missing bounds checking on the PRDT table size (S0). This can lead to local code execution or denial of service (S0).
The potential for local code execution or denial of service without requiring additional execution privileges poses significant security risks (S0).
What should be done?
- Monitor vendor security bulletins
- Apply updates provided by Unisoc
- Tighten access controls for affected components
Chain of evidence and sources
UFS FFU işlevindeki eksik sınır denetimi sınır dışı yazma zafiyetine yol açmaktadır.
Zafiyet ek ayrıcalık gerektirmeden yerel kod yürütmeye veya hizmet reddine neden olabilir.
Show the technical text from the sources
In UFS Field Firmware Update (FFU) functionality, there is a possible out-of-bounds write due to missing bounds checking on the PRDT table size. This could lead to local code execution or denial of service with no additional execution privileges needed.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE: CWE-787
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-121803 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Unisoc (Shanghai) Technologies Co., Ltd. | Storage | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.8 | CVSS V3_1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-121803 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-121803 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
8.8 / 10Vulnerability Scoring Details
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
Similar Vulnerabilities
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