# CVE-2026-23152: wifi: mac80211: correctly decode TTLM with default link map

> A buffer over-read in the Linux kernel Wi-Fi driver allows attackers to cause denial of service or potentially execute code via malformed TTLM elements.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** Yes
- **Published:** 14 Feb 2026
- **Updated:** 11 May 2026
- **Also known as:** BELL-CVE-2026-23152, DEBIAN-CVE-2026-23152, GHSA-hqxw-2v34-r7g3, ROOT-OS-DEBIAN-13-CVE-2026-23152, ROOT-OS-UBUNTU-2404-CVE-2026-23152, UBUNTU-CVE-2026-23152

## What is CVE-2026-23152?

CVE-2026-23152 is a medium-severity memory corruption vulnerability in Linux kernel, published on 14 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: correctly decode TTLM with default link map

TID-To-Link Mapping (TTLM) elements do not contain any link mapping
presence indicator if a default mapping is used and parsing needs to be
skipped.

Note that access points should not explicitly report an advertised TTLM
with a default mapping as that is the implied mapping if the element is
not included, this is even the case when switching back to the default
mapping. However, mac80211 would incorrectly parse the frame and would
also read one byte beyond the end of the element.

## Which versions are affected by CVE-2026-23152?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-23152?

Apply the vendor's patch.

## Is CVE-2026-23152 being exploited?

There is no known exploitation of CVE-2026-23152 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-2026-23152 and fix it if it is affected.

What it is: CVE-2026-23152 is a medium-severity memory corruption vulnerability in Linux kernel, published on 14 Feb 2026. 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-2026-23152 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-2026-23152/ (Markdown: https://insights.sbomify.com/CVE-2026-23152/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23152
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23152
- OSV: https://osv.dev/vulnerability/CVE-2026-23152

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-23152/
Summaries are generated and may contain mistakes; the official description above is the record.