# CVE-2023-0458: Spectre V1 Gadget in do_prlimit in the Linux Kernel

> A speculative execution flaw in the Linux Kernel allows attackers to leak memory contents via the do_prlimit function.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Apr 2023
- **Updated:** 13 Feb 2025
- **Also known as:** AZL-26415, DEBIAN-CVE-2023-0458, UBUNTU-CVE-2023-0458

## What is CVE-2023-0458?

CVE-2023-0458 is a medium-severity vulnerability in Debian Debian Linux, published on 26 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A speculative pointer dereference problem exists in the Linux Kernel on the do_prlimit() function. The resource argument value is controlled and is used in pointer arithmetic for the 'rlim' variable and can be used to leak the contents. We recommend upgrading past version 6.1.8 or commit 739790605705ddcf18f21782b9c99ad7d53a8c11

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2023-0458?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2023-0458?

Upgrade to a fixed version.

## Is CVE-2023-0458 being exploited?

There is no known exploitation of CVE-2023-0458 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0458 and fix it if it is affected.

What it is: CVE-2023-0458 is a medium-severity vulnerability in Debian Debian Linux, published on 26 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-0458 in the wild and no public exploit code.

Affected product: Debian Debian 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-2023-0458/ (Markdown: https://insights.sbomify.com/CVE-2023-0458/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0458
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0458
- OSV: https://osv.dev/vulnerability/CVE-2023-0458

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0458/
Summaries are generated and may contain mistakes; the official description above is the record.