CVE-2026-80990

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: thunderbolt: Release the Rx HopID that was handed out on mismatch

tb_xdomain_alloc_in_hopid() passes the wanted HopID to ida_alloc_range() as the lower bound, so a taken id is not an error there: the allocator returns the next free one above it. tbnet_connected_work() asks for the peer's transmit path, treats any other id as a failure and returns without releasing what it got, so that allocation stays live for the rest of the XDomain connection with nothing left holding a reference to it.

Release the id when it is not the one we asked for, the same way the error unwind at the end of the function releases the expected one.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux180b0689425c6fb2b35e69a3316ee38371a782df < 9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0affected
LinuxLinux180b0689425c6fb2b35e69a3316ee38371a782df < 61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eeaaffected
LinuxLinux180b0689425c6fb2b35e69a3316ee38371a782df < 1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1affected
LinuxLinux180b0689425c6fb2b35e69a3316ee38371a782df < 2f1463554d0561a2fead81e3888604e5c1125e29affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References