CVE-2023-23003 Null dereference in n/a
Medium 4.0
Published
Updated
Check this codebase for CVE-2023-23003 and fix it if it is affected.
What it is: CVE-2023-23003 is a medium-severity vulnerability in Linux kernel, published on 1 Mar 2023. 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-2023-23003 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-2023-23003/ (Markdown: https://insights.sbomify.com/CVE-2023-23003/index.md)
A missing return value check in the Linux kernel perf tool can lead to a null pointer dereference and denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-23003?
CVE-2023-23003 is a medium-severity vulnerability in Linux kernel, published on 1 Mar 2023. 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
In the Linux kernel before 5.16, tools/perf/util/expr.c lacks a check for the hashmap__new return value.
Weakness: CWE-252
Which versions are affected by CVE-2023-23003?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-23003?
Apply the vendor's patch.
Is CVE-2023-23003 being exploited?
There is no known exploitation of CVE-2023-23003 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-25351, DEBIAN-CVE-2023-23003, GHSA-787r-j94j-7wpv, UBUNTU-CVE-2023-23003.