What’s Vulnerable › Vulnerabilities

CVE-2026-74263: net: wwan: t7xx: check skb_clone in control TX

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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.

Affected products

• Linux kernel: 6.4 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

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

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