CVE-2025-63384 Privilege escalation in n/a
The SRET instruction fails to downgrade privilege levels, allowing code to remain in Machine-mode instead of Supervisor-mode, enabling privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-63384?
CVE-2025-63384 is a medium-severity vulnerability in n/a, published on 10 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was discovered in RISC-V Rocket-Chip v1.6 and before implementation where the SRET (Supervisor-mode Exception Return) instruction fails to correctly transition the processor's privilege level. Instead of downgrading from Machine-mode (M-mode) to Supervisor-mode (S-mode) as specified by the sstatus.SPP bit, the processor incorrectly remains in M-mode, leading to a critical privilege retention vulnerability.
Weakness: CWE-266
Which versions are affected by CVE-2025-63384?
It affects 1 product.
Products include Chipsalliance Rocketchip.
How do I fix CVE-2025-63384?
No fix has been published for CVE-2025-63384 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-63384 being exploited?
There is no known exploitation of CVE-2025-63384 in the wild and no public exploit code.
Sources
Also known as GHSA-g435-j3hg-9vfh.