CVE-2026-80923 Affecting kernel-livepatch-6_4_0-150700_53_90-default package, versions <1-150700.15.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.17% (6th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES157-KERNELLIVEPATCH6401507005390DEFAULT-22232074
  • published5 Nov 2026
  • disclosed3 Nov 2026

Introduced: 3 Nov 2026

NewCVE-2026-80923  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-livepatch-6_4_0-150700_53_90-default to version 1-150700.15.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150700_53_90-default package and not the kernel-livepatch-6_4_0-150700_53_90-default package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

In 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()           -&gt; 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)               -&gt; true (dangling)
          tty_unregister_driver()         -&gt; use-after-free

CVSS Base Scores

version 3.1