# CVE-2016-3841: Use after free in n/a > Local attackers can exploit a use-after-free in the Linux kernel IPv6 stack to gain privileges or crash the system via a crafted sendmsg call. - **Severity:** High 7.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:** A user has to click or open something - **Fix available:** Yes - **Published:** 6 Aug 2016 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2016-3841, GHSA-2jwc-wqjh-543h, RHSA-2016:2695, UBUNTU-CVE-2016-3841 ## What is CVE-2016-3841? CVE-2016-3841 is a high-severity use after free vulnerability in Google Android, published on 6 Aug 2016. 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 The IPv6 stack in the Linux kernel before 4.3.3 mishandles options data, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call. Weakness: CWE-416 (Use After Free), CWE-264 ## Which versions are affected by CVE-2016-3841? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `kernel` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-abi-whitelists` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug-debuginfo` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug-devel` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-devel` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-doc` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-headers` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-debuginfo` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-libs` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-libs-devel` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `perf` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `perf-debuginfo` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `python-perf` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `python-perf-debuginfo` | Red Hat:rhel_eus:7.2::computenode | All versions | 0:3.10.0-327.41.3.el7 | | `kernel` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-abi-whitelists` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-bootwrapper` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug-debuginfo` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debug-devel` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo-common-ppc64` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo-common-ppc64le` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo-common-s390x` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-debuginfo-common-x86_64` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-devel` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-doc` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-headers` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-kdump` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-kdump-debuginfo` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-kdump-devel` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-debuginfo` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-libs` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `kernel-tools-libs-devel` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | | `perf` | Red Hat:rhel_eus:7.2::server | All versions | 0:3.10.0-327.41.3.el7 | Products: Google Android, Linux kernel. ## How do I fix CVE-2016-3841? Apply the vendor's patch. ## Is CVE-2016-3841 being exploited? There is no known exploitation of CVE-2016-3841 in the wild and no public exploit code. ## Other vulnerabilities in Google Android - [CVE-2026-58704](https://insights.sbomify.com/CVE-2026-58704/): Google Pixel Improper Authorization (high 8.8, exploited in the wild) - [CVE-2025-48543](https://insights.sbomify.com/CVE-2025-48543/): Android Runtime Use-After-Free (high 8.8, exploited in the wild) - [CVE-2023-35674](https://insights.sbomify.com/CVE-2023-35674/): Android Framework Privilege Escalation (high 8.8, exploited in the wild) - [CVE-2025-48595](https://insights.sbomify.com/CVE-2025-48595/): Android Framework Integer Overflow (high 8.4, exploited in the wild) - [CVE-2024-32896](https://insights.sbomify.com/CVE-2024-32896/): Android Pixel Privilege Escalation (high 8.1, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2016-3841 and fix it if it is affected. What it is: CVE-2016-3841 is a high-severity use after free vulnerability in Google Android, published on 6 Aug 2016. 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-2016-3841 in the wild and no public exploit code. Affected product: Google Android. 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-2016-3841/ (Markdown: https://insights.sbomify.com/CVE-2016-3841/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2016-3841 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-3841 - OSV: https://osv.dev/vulnerability/CVE-2016-3841 --- From sbomify Insights: https://insights.sbomify.com/CVE-2016-3841/ Summaries are generated and may contain mistakes; the official description above is the record.