Not yet scoredPublished Sep 11, 2026

CVE-2026-80990net: thunderbolt: Release the Rx HopID that was handed out on mismatch

Updated under an hour ago (Oct 27, 2026, 6:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 180b0689425c6fb2b35e69a3316ee38371a782df before 47981eb66461ba4e74bbaea0f139adaaeb3991e9; 180b0689425c6fb2b35e69a3316ee38371a782df builds before 9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0; 180b0689425c6fb2b35e69a3316ee38371a782df builds before 61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea; 180b0689425c6fb2b35e69a3316ee38371a782df builds before 1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1; 180b0689425c6fb2b35e69a3316ee38371a782df builds before 2f1463554d0561a2fead81e3888604e5c1125e29	CNA record

References

References

https://git.kernel.org/stable/c/47981eb66461ba4e74bbaea0f139adaaeb3991e9
https://git.kernel.org/stable/c/9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0
https://git.kernel.org/stable/c/61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea
https://git.kernel.org/stable/c/1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1
https://git.kernel.org/stable/c/2f1463554d0561a2fead81e3888604e5c1125e29

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.