# CVE-2020-10757: Privilege escalation in Kernel > A local attacker with access to DAX-enabled storage can escalate privileges due to improper handling of DAX Huge Pages in mremap. - **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 9 Jun 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-10757, GHSA-5r3p-jhq4-64gg, RHSA-2020:3598, SUSE-SU-2020:1764-1, SUSE-SU-2020:1781-1, UBUNTU-CVE-2020-10757 ## What is CVE-2020-10757? CVE-2020-10757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim. ### Official 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. Weakness: CWE-843 (Access of Resource Using Incompatible Type), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) ## Which versions are affected by CVE-2020-10757? It affects 10 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `bpftool` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `bpftool-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-abi-whitelists` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug-devel` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-devel` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-doc` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-headers` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-tools` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-tools-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-tools-libs` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-tools-libs-devel` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `perf` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `perf-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `python-perf` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `python-perf-debuginfo` | Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 | | `bpftool` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `bpftool-debuginfo` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-abi-whitelists` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-bootwrapper` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug-debuginfo` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debug-devel` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo-common-ppc64` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo-common-ppc64le` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo-common-s390x` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-devel` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-doc` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-headers` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-kdump` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-kdump-debuginfo` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-kdump-devel` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | | `kernel-tools` | Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 | Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Steelstore Cloud Integrated Storage, Opensuse Leap, Redhat Enterprise Linux, Redhat Enterprise Mrg. ## How do I fix CVE-2020-10757? Apply the vendor's patch. ## Is CVE-2020-10757 being exploited? There is no known exploitation of CVE-2020-10757 in the wild and no public exploit code. Public exploit code: - https://github.com/ShaikUsaf/linux-4.19.72_CVE-2020-10757 (github_poc): https://github.com/ShaikUsaf/linux-4.19.72_CVE-2020-10757 ## Other vulnerabilities in Canonical Ubuntu Linux - [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild) - [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild) - [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-10757 and fix it if it is affected. What it is: CVE-2020-10757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-10757 in the wild and no public exploit code. Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-10757/ (Markdown: https://insights.sbomify.com/CVE-2020-10757/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10757 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10757 - OSV: https://osv.dev/vulnerability/CVE-2020-10757 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-10757/ Summaries are generated and may contain mistakes; the official description above is the record.