CVE-2026-53706 Other in prevail
The PREVAIL eBPF verifier incorrectly accepts unsafe pointer arithmetic, allowing attackers to load programs that cause kernel faults or potential code execution.
- 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-2026-53706?
CVE-2026-53706 is a high-severity vulnerability in vbpf prevail, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the prevail eBPF verifier accepts ALU32 ADD and SUB instructions that operate on pointer-typed registers without checking the is64 flag. Because ALU32 arithmetic zero-extends the 32-bit result, the upper half of any pointer is silently destroyed at runtime, yet prevail marks the program as verified safe. Any caller that can submit an eBPF program for verification — including unprivileged users on kernels that permit BPF program loading — can produce a program that passes verification but faults or misbehaves at runtime. This issue has been patched in version 0.2.4.
Weakness: CWE-682
Which versions are affected by CVE-2026-53706?
How do I fix CVE-2026-53706?
No fix has been published for CVE-2026-53706 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-53706 being exploited?
There is no known exploitation of CVE-2026-53706 in the wild and no public exploit code.
Sources
Also known as GHSA-65fp-5qmq-gg2m.