# CVE-2026-74622: net: atlantic: free RX pages of consumed but not refilled buffers

> A memory leak in the Atlantic network driver allows attackers to cause denial of service by exhausting kernel memory through interface resets.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Aug 2026
- **Updated:** 22 Aug 2026
- **Also known as:** AZL-97068, BELL-CVE-2026-74622, DEBIAN-CVE-2026-74622, GHSA-897x-r623-rfvq, UBUNTU-CVE-2026-74622

## What is CVE-2026-74622?

CVE-2026-74622 is a memory corruption vulnerability in Linux, published on 22 Aug 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:

net: atlantic: free RX pages of consumed but not refilled buffers

aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to
hardware. Since the page reuse strategy was added, a cleaned RX buffer
keeps its page (and its DMA mapping) in the ring for reuse, and refill
is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES
slots are free. Slots that were consumed but not yet reposted therefore
sit in the complementary [sw_tail, sw_head) gap with a live page, and
the deinit walk never visits them: up to a refill batch worth of pages
and DMA mappings leak on every interface down.

Walk the whole ring instead and release whatever is still there. Also
bail out if the buffer ring is already gone: a partial
aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so
aq_ptp_ring_deinit() still gets here on the unwind path.

## Which versions are affected by CVE-2026-74622?


## How do I fix CVE-2026-74622?

Apply the vendor's patch.

## Is CVE-2026-74622 being exploited?

There is no known exploitation of CVE-2026-74622 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-74622 and fix it if it is affected.

What it is: CVE-2026-74622 is a memory corruption vulnerability in Linux, published on 22 Aug 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-2026-74622 in the wild and no public exploit code.

Affected product: 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-2026-74622/ (Markdown: https://insights.sbomify.com/CVE-2026-74622/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-74622
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-74622
- OSV: https://osv.dev/vulnerability/CVE-2026-74622

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-74622/
Summaries are generated and may contain mistakes; the official description above is the record.