# CVE-2023-2860: Out-of-bounds read when setting hmac data

> A privileged local user can exploit an out-of-bounds read in the Linux kernel SR-IPv6 implementation to disclose sensitive information.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Jul 2023
- **Updated:** 5 Mar 2025
- **Also known as:** AZL-27797, DEBIAN-CVE-2023-2860, GHSA-m5px-pcx9-8w6j, UBUNTU-CVE-2023-2860

## What is CVE-2023-2860?

CVE-2023-2860 is a medium-severity vulnerability in Linux kernel, published on 24 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An out-of-bounds read vulnerability was found in the SR-IPv6 implementation in the Linux kernel. The flaw exists within the processing of seg6 attributes. The issue results from the improper validation of user-supplied data, which can result in a read past the end of an allocated buffer. This flaw allows a privileged local user to disclose sensitive information on affected installations of the Linux kernel.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-2860?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-2860?

Apply the vendor's patch.

## Is CVE-2023-2860 being exploited?

There is no known exploitation of CVE-2023-2860 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-2023-2860 and fix it if it is affected.

What it is: CVE-2023-2860 is a medium-severity vulnerability in Linux kernel, published on 24 Jul 2023. 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-2023-2860 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-2023-2860/ (Markdown: https://insights.sbomify.com/CVE-2023-2860/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2860
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2860
- OSV: https://osv.dev/vulnerability/CVE-2023-2860

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2860/
Summaries are generated and may contain mistakes; the official description above is the record.