CVE-2025-0577 Glibc: vdso getrandom acceleration may return predictable randomness
Attackers can predict random numbers generated by glibc after a fork, potentially compromising cryptographic security in applications relying on these functions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-0577?
CVE-2025-0577 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 18 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An insufficient entropy vulnerability was found in glibc. The getrandom and arc4random family of functions may return predictable randomness if these functions are called again after the fork, which happens concurrently with a call to any of these functions.
Weakness: CWE-331
Which versions are affected by CVE-2025-0577?
How do I fix CVE-2025-0577?
No fix has been published for CVE-2025-0577 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-0577 being exploited?
There is no known exploitation of CVE-2025-0577 in the wild and no public exploit code.
Sources
Also known as GHSA-7qhw-4fcq-2g37.