CVE-2026-64266

Summary

In the Linux kernel, the following vulnerability has been resolved:

fuse: re-lock request before returning from fuse_ref_folio()

fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues.

Fix this by locking the request in fuse_ref_folio() before returning.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < 1f9156714592356b4fda57beac7eab9c2a462dd3affected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < 5630da218a45ba80f0aba0846cbe8aa655da122baffected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < 1ca605cfa59377f0143fb35b5b01360f37d1b7c4affected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < 0e4a5a000123d81234e27a2f8187688cf608f755affected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < e6aa539720c3d8def69683ed0c07cf9faea4e8beaffected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < be353caffa8640f5e25fb3714ce8b0cef5e410e5affected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < 65a1c2551f7e16085acbb54aedde1feaa559ba7aaffected
LinuxLinuxc3021629a0d820247ee12b6c5192a1d5380e21c6 < b5befa80fdbe287a98480effed9564712924add5affected
LinuxLinux2.6.35affected
LinuxLinux0 < 2.6.35unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References