# CVE-2026-53055: crypto: hisilicon/sec2 - prevent req used-after-free for sec

> A use-after-free vulnerability in the Linux kernel's Hisilicon SEC2 crypto driver allows attackers to cause denial of service or execute code under heavy load.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Jun 2026
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2026-53055, DEBIAN-CVE-2026-53055, GHSA-22hh-g7wj-354w, UBUNTU-CVE-2026-53055

## What is CVE-2026-53055?

CVE-2026-53055 is a critical use after free vulnerability in Linux kernel, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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

crypto: hisilicon/sec2 - prevent req used-after-free for sec

During packet transmission, if the system is under heavy load,
the hardware might complete processing the packet and free the
request memory (req) before the transmission function finishes.
If the software subsequently accesses this req, a use-after-free
error will occur. The qp_ctx memory exists throughout the packet
sending process, so replace the req with the qp_ctx.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2026-53055?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-53055?

Apply the vendor's patch.

## Is CVE-2026-53055 being exploited?

There is no known exploitation of CVE-2026-53055 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-2026-53055 and fix it if it is affected.

What it is: CVE-2026-53055 is a critical use after free vulnerability in Linux kernel, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-53055 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-2026-53055/ (Markdown: https://insights.sbomify.com/CVE-2026-53055/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53055
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53055
- OSV: https://osv.dev/vulnerability/CVE-2026-53055

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53055/
Summaries are generated and may contain mistakes; the official description above is the record.