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

Summary

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.

Timeline

1. Sep 4, 2026, 3:54 PM UTCCVE published
2. Oct 19, 2026, 8:44 AM UTCRecord last updated

Affected versions

• Linux Linux

  From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in e4039e9bebb528dd9cd7ac72aeaec529c26c355a; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in ade18b4ce78a16558f4f435aece80082f6f7b64c; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in bb572801290e25ec1c4753d14af35777303f5d6b; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in 62cd519ab74cac499036cd88c11692f8f0d53e14; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in ff172092cba7ec990ecc7b610ce703e19570b8f0; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in 7983daa159981fac125db2457437723f38ea1472; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in f24dcc61bd0ecf7639fac5bf700450b398d793a7; From e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d · fixed in b1e24de475bf2d66fffc9103f3444b783527d55a

• Linux Linux

  2.6.26

• KernelLinux

  From 2.6.26 · fixed in 5.10.269; From 5.11.0 · fixed in 5.15.220; From 5.16.0 · fixed in 6.1.187; From 6.2.0 · fixed in 6.6.156; From 6.7.0 · fixed in 6.12.108; From 6.13.0 · fixed in 6.18.49; From 6.19.0 · fixed in 7.1.13; From 7.2.0 · fixed in 7.2.3

References 9