CVE-2026-90334

CVE CVE-2026-90334EUVD EUVD-2026-81995Published 2026-09-17T16:08:47.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux c1a752ba2d6b8a52879c7ab637cff38359ea9827 <4f6bd79bb7e55095f09bec9b4eb6c09df1306116; patch: 6.12.110; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <a83fcddf3c75d004f12aa13555bb73da19fb75a9; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <5c5a795bf6248fe96f96dd9fd79d66bbb4a92077; patch: 6.1.188; patch: 7.3-rc1; patch: 5.10.270; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <33a44333a9dfda044b0e233399b12ead7f8a90ae; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <fb1de260033c215dba438973d82b48562bdc86bb; patch: 0; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <e9e64dd02fd68776afda00777591eca0c3984285; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <d331c63570af61ef7aaf516b64a8d6f47518a3a4; c1a752ba2d6b8a52879c7ab637cff38359ea9827 <6645856f0df3aeecd45519cb611415b4b89c2223; patch: 6.18.52; patch: 7.2.6; 4.3; patch: 5.15.221; patch: 6.6.157

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.