CVE-2019-11487 Use after free in n/a
High 7.8
Published
Updated
Check this codebase for CVE-2019-11487 and fix it if it is affected.
What it is: CVE-2019-11487 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 23 Apr 2019. 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-2019-11487 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-2019-11487/ (Markdown: https://insights.sbomify.com/CVE-2019-11487/index.md)
A reference count overflow in the Linux kernel can lead to use-after-free issues, potentially allowing local attackers to execute code or escalate privileges.
- 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
What is CVE-2019-11487?
CVE-2019-11487 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 23 Apr 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur with FUSE requests.
Weakness: CWE-416
Which versions are affected by CVE-2019-11487?
It affects 3 products.
Linux distribution packages (40)
kernel Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-debuginfo Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-devel Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-i686 Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:6::client | All versions | 0:2.6.32-754.35.1.el6 |
kernel Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-devel Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-i686 Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:6::computenode | All versions | 0:2.6.32-754.35.1.el6 |
kernel Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-devel Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-i686 Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-ppc64 Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-s390x Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-kdump Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-kdump-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel-kdump-devel Red Hat:enterprise_linux:6::server | All versions | 0:2.6.32-754.35.1.el6 |
kernel Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-debuginfo Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debug-devel Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-i686 Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:6::workstation | All versions | 0:2.6.32-754.35.1.el6 |
kernel-rt Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-debug Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-debug-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-debug-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-debuginfo-common-x86_64 Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
kernel-rt-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-693.71.2.rt56.670.el6rt |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2019-11487?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2019-11487 being exploited?
There is no known exploitation of CVE-2019-11487 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2019-11487, GHSA-vrxc-79fp-6683, RHSA-2020:3266, RHSA-2020:4182, SUSE-SU-2019:1768-1, UBUNTU-CVE-2019-11487.