CVE-2026-80530

CVE CVE-2026-80530EUVD EUVD-2026-66445Veröffentlicht 2026-08-26T14:37:07.000ZZuletzt geändert 2026-08-27T05:01:24.000ZCVSS 7.1

Was das Advisory beschreibt

In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN When exchanging two full-file ranges, xmi_can_exchange_reflink_flags() can move the reflink inode flag from the file that currently has it to the other file, as long as exactly one side is marked. This assumes that the file contents, and therefore all shared extents, are exchanged. That assumption is not true when XFS_EXCHMAPS_INO1_WRITTEN is set. xfs_exchmaps_can_skip_mapping() can skip hole and unwritten mappings from file1, so an exchange can complete without moving every mapping that the earlier flag-swap decision accounted for. In that case the post-operation cleanup can clear the reflink flag from an inode that still owns shared written extents. Later writes then take the non-reflink write path and may update blocks that should still have been protected by CoW, which shows up as data corruption between reflink-related files. Fix this by disabling the reflink flag exchange whenever XFS_EXCHMAPS_INO1_WRITTEN is requested. The contents exchange can still proceed; the conservative outcome is that both inodes keep the reflink flag. The regular reflink flag cleanup path can drop the extra flag later once the inode no longer has shared extents.

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 patch: 6.18.46; patch: 7.2; 966ceafc7a437105ecfe1cadb3747b2965a260ca <2efbd8890b53f4756fdc7b0ef346fa514ffb7d66; 6.10; 966ceafc7a437105ecfe1cadb3747b2965a260ca <b2d5a81dae385333f9734910277fbf94c78bd17f; patch: 0; patch: 7.1.10; 966ceafc7a437105ecfe1cadb3747b2965a260ca <0f27b22343b63e10773e6781344640c2c753eec3; patch: 6.12.105; 966ceafc7a437105ecfe1cadb3747b2965a260ca <03c9c9116e6da641424681f705698d7f5e2128e0

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.