What’s Vulnerable › Vulnerabilities

CVE-2026-80826: USB: c67x00: fix use-after-free in c67x00_add_iso_urb()

• 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: 2026-09-04 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: USB: c67x00: fix use-after-free in c67x00_add_iso_urb() When TD creation fails for the last packet of an isochronous URB, c67x00_add_iso_urb() gives the URB back before updating the endpoint scheduling state. c67x00_giveback_urb() frees the URB private data, and the completion callback may release the final URB reference. The following accesses to urbp->ep_data, urb->interval, and urbp->cnt can therefore use freed memory. Update next_frame and cnt before giving back the failed final packet, making the giveback the last operation that uses the URB and its private data.

Affected products

• Linux kernel: 2.6.26 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/62cd519ab74cac499036cd88c11692f8f0d53e14
• https://git.kernel.org/stable/c/7983daa159981fac125db2457437723f38ea1472
• https://git.kernel.org/stable/c/ade18b4ce78a16558f4f435aece80082f6f7b64c
• https://git.kernel.org/stable/c/b1e24de475bf2d66fffc9103f3444b783527d55a
• https://git.kernel.org/stable/c/b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421
• https://git.kernel.org/stable/c/bb572801290e25ec1c4753d14af35777303f5d6b
• https://git.kernel.org/stable/c/e4039e9bebb528dd9cd7ac72aeaec529c26c355a
• https://git.kernel.org/stable/c/f24dcc61bd0ecf7639fac5bf700450b398d793a7
• https://git.kernel.org/stable/c/ff172092cba7ec990ecc7b610ce703e19570b8f0

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