CVE-2026-97933

CVE CVE-2026-97933EUVD EUVD-2026-86787Veröffentlicht 2026-09-25T10:22:48.000Z

Was das Advisory beschreibt

In the Linux kernel, the following vulnerability has been resolved: tracing: Take trace_array reference when opening a tracer options file When a tracer option file is opened, it is passed a descriptor that points to an element on the trace_array's topts array. This element has information to find the trace array and other information. It uses this element to take a reference of the trace_array so that the trace_array does not get removed while this file is opened. Unfortunately, there's a race condition where the element itself could be freed by the removal of the instance the trace_array represents causing a use-after-free as this element that is used to find the trace_array to increment its reference counter is also freed when the instance is removed. To solve this, add a trace_array_tracer_options_get() helper function that will take the address of the element that is passed to the open function by the inode->i_private pointer and search all the trace_arrays under a lock to find the one that the element's address is in the range of the trace_arrays topts array elements. When a match happens, that trace_array's reference would be increased. Note, there's a race where if an admin was deleting and creating trace instances at the same time and the memory of the old trace_array's array matched the memory of the new trace_array that it could in theory open the option from the wrong trace array. But we do not care because it would be stupid to perform that kind of action. As long as the only thing that can happen is that the option from the wrong trace array is used and doesn't crash the kernel it will only make the user confused. But if they are doing something stupid like this, they are already confused, so no harm done.

Quelle: EUVD (ENISA), im Wortlaut der Meldung.

Produkte, die das Advisory nennt

Diese Angaben stammen aus der Meldung selbst, nicht aus einer Prüfung durch uns.

• Linux — Linux 7e2cfbd2d3c86afcd5c26b5c4b1dd251f63c5838 <ed0aff60f83a9bdc2f6556376ac79c96b3ce7e80; 7e2cfbd2d3c86afcd5c26b5c4b1dd251f63c5838 <b2fb87d29ffb3a7a9ccc5acf12898ecb80587427; 6.5.5 <6.6; 952e477f908048145a5eb2ed3d431d9efc1e1073; 586787a0331aa2d7d244e9c4400d2a73295b0cf0; 5.4.257 <5.5; 5.15.133 <5.16; 6.6; patch: 7.2.7; patch: 7.3-rc3; 2617afde0c3db285778734b0ccad9a55b4f9cda2; b3183f5f05cd867f5c17122773ca5aa8d07b51af; patch: 0; 6.1.55 <6.2; 5.10.197 <5.11; bf38c1d29f8bfe9631b62a67f8dd1b8f7efb7139

Die genannten Versionen sind die Angabe der Meldung. Patchlage vergleicht keine Versionsnummern und leitet aus ihnen keine Aussage ab — welche Version installiert ist, muss ein Mensch nachsehen.

Im Produktkatalog geführt

Für diese Produkte kann ein Bestand in Patchlage erfasst werden. Ein Advisory dazu erscheint am Morgen danach im Lagebericht.

• Linux — Linux

Patchlage meldet Treffer und Verdachtsfälle. Zu allem anderen sagt dieses System nichts — weder diese Seite noch der Lagebericht behauptet je, dass ein Bestand sicher ist.