CVE-2026-68295 LoongArch: BPF: Zero-extend signed ALU32 div/mod results
A flaw in the LoongArch BPF JIT compiler mishandles signed division results, potentially allowing attackers to execute arbitrary code via crafted BPF programs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68295?
CVE-2026-68295 is a high-severity vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: BPF: Zero-extend signed ALU32 div/mod results
ALU32 operations write a 32-bit result and leave the upper 32 bits of the BPF register zero. The LoongArch JIT sign-extends the result of signed ALU32 BPF_DIV and BPF_MOD (off=1), so a negative 32-bit quotient or remainder leaves bits 63:32 set in JITted code while the verifier and interpreter model those bits as zero.
Keep sign-extension on the operands, which signed divide needs, and zero-extend the ALU32 result after the divide or modulo instruction, matching the unsigned ALU32 div/mod paths and every other ALU32 operation in this JIT.
Which versions are affected by CVE-2026-68295?
How do I fix CVE-2026-68295?
Apply the vendor's patch.
Is CVE-2026-68295 being exploited?
There is no known exploitation of CVE-2026-68295 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68295, DEBIAN-CVE-2026-68295, GHSA-vrqj-mf6p-p2fv, UBUNTU-CVE-2026-68295.