01 Record
CVE-2026-33957
An issue was discovered in CustOS Driver in Samsung Mobile Processor Exynos 1580. Requesting oversized shared memory from the custos_iwc device enables out-of-bounds read and write, potentially
MediumPUBLISHEDCNA: mitre
CNA base score4.2 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L
02 Description
An issue was discovered in CustOS Driver in Samsung Mobile Processor Exynos 1580. Requesting oversized shared memory from the custos_iwc device enables out-of-bounds read and write, potentially
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.12% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 1.9% of scored records. A rank, not a probability.
- NVD base score
- 4.2 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-09-22.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-09-14 00:00Z1 MO AGO
- Last updated
- 2026-09-14 18:14Z1 MO AGO
- Reserved
- 2026-03-24
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.2)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L
- Weaknesses
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.2
- Document digest
- df88f7c9d12ad9ffacc1d2c6394f4258fcd0c0607219b589f3093f154b00474e
05 Affected products
VendorProductVersionsPlatforms
06 References
- semiconductor.samsung.comhttps://semiconductor.samsung.com/support/quality-support/product-security-updates/
- semiconductor.samsung.comhttps://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2026-33957/