# CVE-2020-36385: Use after free in n/a > A use-after-free in the Linux kernel InfiniBand driver allows attackers to execute arbitrary code or escalate privileges. - **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 7 Jun 2021 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-36385, GHSA-hpxg-r4xf-hphw, RHSA-2021:4597, RHSA-2021:4770, RHSA-2021:4773, RHSA-2021:4774, RHSA-2021:4777, RHSA-2021:4779, RHSA-2021:4798, RHSA-2021:4859, RHSA-2021:4971, UBUNTU-CVE-2020-36385 ## What is CVE-2020-36385? CVE-2020-36385 is a high-severity use after free vulnerability in Linux kernel, published on 7 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link. ### Official description An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c. Weakness: CWE-416 (Use After Free) ## Which versions are affected by CVE-2020-36385? It affects 11 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `bpftool` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `bpftool-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-abi-whitelists` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-doc` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools-libs` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools-libs-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `perf` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `perf-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `python-perf` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `python-perf-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.49.1.el7 | | `bpftool-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-tools-libs-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `perf-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `python-perf-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.49.1.el7 | | `bpftool` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `bpftool-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-abi-whitelists` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-bootwrapper` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debug-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-ppc64` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-ppc64le` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-s390x` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.49.1.el7 | Products: Linux kernel, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500e Firmware, Netapp H500s Firmware, Netapp H700e Firmware, Netapp H700s Firmware, Starwindsoftware Starwind San \& Nas, Starwindsoftware Starwind Virtual San. ## How do I fix CVE-2020-36385? Apply the vendor's patch. ## Is CVE-2020-36385 being exploited? There is no known exploitation of CVE-2020-36385 in the wild and no public exploit code. ## Other vulnerabilities in Linux kernel - [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild) - [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild) - [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild) - [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild) - [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-36385 and fix it if it is affected. What it is: CVE-2020-36385 is a high-severity use after free vulnerability in Linux kernel, published on 7 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2020-36385 in the wild and no public exploit code. Affected product: Linux kernel. 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-2020-36385/ (Markdown: https://insights.sbomify.com/CVE-2020-36385/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36385 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36385 - OSV: https://osv.dev/vulnerability/CVE-2020-36385 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-36385/ Summaries are generated and may contain mistakes; the official description above is the record.