CVE-2026-80826

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

State: Published
Severity: Not scored
Published: Sep 4, 2026
Updated: Oct 19, 2026
Reserved: Aug 26, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before e4039e9bebb528dd9cd7ac72aeaec529c26c355aAffected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before ade18b4ce78a16558f4f435aece80082f6f7b64cAffected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before bb572801290e25ec1c4753d14af35777303f5d6bAffected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before 62cd519ab74cac499036cd88c11692f8f0d53e14Affected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before ff172092cba7ec990ecc7b610ce703e19570b8f0Affected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421Affected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before 7983daa159981fac125db2457437723f38ea1472Affected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before f24dcc61bd0ecf7639fac5bf700450b398d793a7Affected e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before b1e24de475bf2d66fffc9103f3444b783527d55aAffected
LinuxLinux	2.6.26Affected before 2.6.26Not affected 5.10.269 through 5.10.Not affected 5.15.220 through 5.15.Not affected 6.1.187 through 6.1.Not affected 6.6.156 through 6.6.Not affected 6.12.108 through 6.12.Not affected 6.18.49 through 6.18.Not affected 7.1.13 through 7.1.Not affected 7.2.3 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before e4039e9bebb528dd9cd7ac72aeaec529c26c355aAffected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before ade18b4ce78a16558f4f435aece80082f6f7b64cAffected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before bb572801290e25ec1c4753d14af35777303f5d6bAffected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before 62cd519ab74cac499036cd88c11692f8f0d53e14Affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before ff172092cba7ec990ecc7b610ce703e19570b8f0Affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421Affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before 7983daa159981fac125db2457437723f38ea1472Affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before f24dcc61bd0ecf7639fac5bf700450b398d793a7Affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d to before b1e24de475bf2d66fffc9103f3444b783527d55aAffected

LinuxLinux

2.6.26Affected
before 2.6.26Not affected
5.10.269 through 5.10.*Not affected
5.15.220 through 5.15.*Not affected
6.1.187 through 6.1.*Not affected
6.6.156 through 6.6.*Not affected
6.12.108 through 6.12.*Not affected
6.18.49 through 6.18.*Not affected
7.1.13 through 7.1.*Not affected
7.2.3 through 7.2.*Not affected
7.3 and laterNot affected

References

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