CVE-2026-64069

01/תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix cancellation of a DIO and single read subrequests When the preparation of a new subrequest for a read fails, if the subrequest has already been added to the stream->subrequests list, it can't simply be put and abandoned as the collector may see it. Also, if it hasn't been queued yet, it has two outstanding refs that both need to be put. Both DIO read and single-read dispatch fail at this; further, both differ in the order they do things to the way buffered read works. Fix cancellation of both DIO-read and single-read subrequests that failed preparation by the following steps: (1) Harmonise all three reads (buffered, dio, single) to queue the subreq before prepping it. (2) Make all three call netfs_queue_read() to do the queuing. (3) Set NETFS_RREQ_ALL_QUEUED independently of the queuing as we don't know the length of the subreq at this point. (4) In all cases, set the error and NETFS_SREQ_FAILED flag on the subreq and then call netfs_read_subreq_terminated() to deal with it. This will pass responsibility off to the collector for dealing with it.

02/מוצרים מושפעים

linux: linux kernel

03/קישורים3

• git.kernel.org/stable/c/5366199be46fb53de62861721d34ba816e7e440e Patch
• git.kernel.org/stable/c/6f0f7ac1915abc0d202f0eb4b003a6548a5ba60d Patch
• git.kernel.org/stable/c/f73372a4c6900d117f8e903fe10b62692f95e6c4 Patch