xhci: dbgtty: Fix unregister on tty_register_driver() failure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80923
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 17:17:47 UTC
Updated2026-09-09 17:17:47 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xhci: dbgtty: Fix unregister on tty_register_driver() failure If tty_register_driver() fails, it drops the reference, but fails to set the global dbc_tty_driver to NULL, causing the unregister to be called again when module exits. On module unload dbc_tty_exit() only gates its cleanup on the driver pointer being non-NULL, so it operates on the already-freed driver: module_init(xhci_hcd_init) xhci_hcd_init() xhci_dbc_init() [return value ignored] dbc_tty_init() tty_register_driver() fails tty_driver_kref_put() -> driver freed (dbc_tty_driver left dangling) ... module_exit(xhci_hcd_fini) xhci_hcd_fini() xhci_dbc_exit() dbc_tty_exit() if (dbc_tty_driver) -> true (dangling) tty_unregister_driver() -> use-after-free

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 01b7bc0938061f2fd46e0094f6483d8c6c02f7d3 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 43635ff6401ca0e0ed21875379eeded921321525 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 eaca2814f32b9872a332326324b9e83e01f156d2 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 943f976c93e70563b132f5585ff68b08c89641a2 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 33ed35ca629477f57e0dd1d77d6df96cf5a9eb55 git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 0e469b94fbba8eb03666da41dd1082b793c50c1a git Not specified
CNA Linux Linux affected 4521f16139409cdf9462c7325d43454462cff6c3 a916fa66a43e10f63198b6ce978badffc678821a git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 5.15.220 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.187 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.156 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.108 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.49 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.13 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2.3 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/33ed35ca629477f57e0dd1d77d6df96cf5a9eb55 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a916fa66a43e10f63198b6ce978badffc678821a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/943f976c93e70563b132f5585ff68b08c89641a2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0e469b94fbba8eb03666da41dd1082b793c50c1a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/01b7bc0938061f2fd46e0094f6483d8c6c02f7d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/43635ff6401ca0e0ed21875379eeded921321525 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eaca2814f32b9872a332326324b9e83e01f156d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report