CVE-2026-33957 Memory corruption in Exynos 1580 firmware
An out-of-bounds read and write in the CustOS Driver allows attackers to cause memory corruption or leak information on Samsung Exynos 1580 devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33957?
CVE-2026-33957 is a medium-severity memory corruption vulnerability in Samsung Exynos 1580 firmware, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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 leading to memory corruption or information leakage.
Weakness: CWE-787
Which versions are affected by CVE-2026-33957?
How do I fix CVE-2026-33957?
No fix has been published for CVE-2026-33957 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-33957 being exploited?
There is no known exploitation of CVE-2026-33957 in the wild and no public exploit code.
Sources
Also known as GHSA-4cjw-7m6g-3q48.