{"id":"CVE-2026-80990","title":"net: thunderbolt: Release the Rx HopID that was handed out on mismatch","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: thunderbolt: Release the Rx HopID that was handed out on mismatch\n\ntb_xdomain_alloc_in_hopid() passes the wanted HopID to ida_alloc_range()\nas the lower bound, so …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-772"],"vendor":"Linux","product":"Linux","affected":["Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 47981eb66461ba4e74bbaea0f139adaaeb3991e9","Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0","Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea","Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1","Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 2f1463554d0561a2fead81e3888604e5c1125e29","Linux 5.13"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:46:14.490Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80990","references":[{"url":"https://git.kernel.org/stable/c/47981eb66461ba4e74bbaea0f139adaaeb3991e9"},{"url":"https://git.kernel.org/stable/c/9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0"},{"url":"https://git.kernel.org/stable/c/61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea"},{"url":"https://git.kernel.org/stable/c/1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1"},{"url":"https://git.kernel.org/stable/c/2f1463554d0561a2fead81e3888604e5c1125e29"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80990.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80990"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532275"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80990"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80990"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80990.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00206,"epssPercentile":0.10484,"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80990","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: thunderbolt: Release the Rx HopID that was handed out on mismatch\n\ntb_xdomain_alloc_in_hopid() passes the wanted HopID to ida_alloc_range()\nas the lower bound, so a taken id is not an error there: the allocator\nreturns the next free one above it. tbnet_connected_work() asks for the\npeer's transmit path, treats any other id as a failure and returns\nwithout releasing what it got, so that allocation stays live for the rest\nof the XDomain connection with nothing left holding a reference to it.\n\nRelease the id when it is not the one we asked for, the same way the\nerror unwind at the end of the function releases the expected one.\n\n## Affected\n\n- `Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 47981eb66461ba4e74bbaea0f139adaaeb3991e9`\n- `Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0`\n- `Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea`\n- `Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1`\n- `Linux >= 180b0689425c6fb2b35e69a3316ee38371a782df < 2f1463554d0561a2fead81e3888604e5c1125e29`\n- `Linux 5.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80990.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204154,"id":"CVE-2026-80990","ts":1789490233823,"field":"cvss","old":null,"new":"5.5"},{"seq":204153,"id":"CVE-2026-80990","ts":1789490233823,"field":"severity","old":"none","new":"medium"},{"seq":147540,"id":"CVE-2026-80990","ts":1789270211308,"field":"cvss","old":null,"new":"4.8"},{"seq":147539,"id":"CVE-2026-80990","ts":1789270211308,"field":"severity","old":"none","new":"medium"},{"seq":109292,"id":"CVE-2026-80990","ts":1789183731307,"field":"cvss","old":null,"new":"4.8"},{"seq":109291,"id":"CVE-2026-80990","ts":1789183731307,"field":"severity","old":"none","new":"medium"}]}