CVE-2026-64294

A flaw was found in the Linux kernel's memory management subsystem. This vulnerability arises from incorrect handling of file ownership checks within idmapped mounts, a feature that allows remapping user and group IDs. When certain memory operations are performed on files in an idmapped mount, th...

SUSE CVE-2026-64294

In the Linux kernel, the following vulnerability has been resolved: mm: do file ownership checks with the proper mount idmap Ever since idmapped mounts were introduced, inode ownership checks for side-channel protection in mincore and madviseMADVPAGEOUT were done against the nopmntidmap, which...

CVE-2026-64294

In the Linux kernel, the following vulnerability has been resolved: mm: do file ownership checks with the proper mount idmap Ever since idmapped mounts were introduced, inode ownership checks for side-channel protection in mincore and madviseMADVPAGEOUT were done against the nopmntidmap, which...

CVE-2026-64294 mm: do file ownership checks with the proper mount idmap

In the Linux kernel, the following vulnerability has been resolved: mm: do file ownership checks with the proper mount idmap Ever since idmapped mounts were introduced, inode ownership checks for side-channel protection in mincore and madviseMADVPAGEOUT were done against the nopmntidmap, which...

CVE-2026-64294

CVE-2026-64294 affects the Linux kernel where in idmapped mounts, inode ownership checks for side-channel protection in mincore() and MADV_PAGEOUT could be performed against nop_mnt_idmap, ignoring the file’s mount idmap. The fix introduces a new abstraction, file_owner_or_capable(), to carry the...

PT-2026-64515

In the Linux kernel, the following vulnerability has been resolved: mm: do file ownership checks with the proper mount idmap Ever since idmapped mounts were introduced, inode ownership checks for side-channel protection in mincore and madviseMADV PAGEOUT were done against the nop mnt idmap, which...

SUSE CVE-2021-46923

In the Linux kernel, the following vulnerability has been resolved: fs/mountsetattr: always cleanup mountkattr Make sure that finishmountkattr is called after mountkattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We...

UBUNTU-CVE-2021-46923

In the Linux kernel, the following vulnerability has been resolved: fs/mountsetattr: always cleanup mountkattr Make sure that finishmountkattr is called after mountkattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We...