cbcvebase.
CVE-2024-57924
published 2025-01-19

CVE-2024-57924: In the Linux kernel, the following vulnerability has been resolved: fs: relax assertions on failure to encode file handles Encoding file handles is usually…

PriorityP422medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.4th percentile
In the Linux kernel, the following vulnerability has been resolved: fs: relax assertions on failure to encode file handles Encoding file handles is usually performed by a filesystem >encode_fh() method that may fail for various reasons. The legacy users of exportfs_encode_fh(), namely, nfsd and name_to_handle_at(2) syscall are ready to cope with the possibility of failure to encode a file handle. There are a few other users of exportfs_encode_{fh,fid}() that currently have a WARN_ON() assertion when ->encode_fh() fails. Relax those assertions because they are wrong. The second linked bug report states commit 16aac5ad1fa9 ("ovl: support encoding non-decodable file handles") in v6.6 as the regressing commit, but this is not accurate. The aforementioned commit only increases the chances of the assertion and allows triggering the assertion with the reproducer using overlayfs, inotify and drop_caches. Triggering this assertion was always possible with other filesystems and other reasons of ->encode_fh() failures and more particularly, it was also possible with the exact same reproducer using overlayfs that is mounted with options index=on,nfs_export=on also on kernels < v6.6. Therefore, I am not listing the aforementioned commit as a Fixes commit. Backport hint: this patch will have a trivial conflict applying to v6.6.y, and other trivial conflicts applying to stable kernels < v6.6.

Affected

20 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.153-1 (bookworm)linux 6.1.153-1 (bookworm)
debianlinux-6.1< linux 6.1.153-1 (bookworm)linux 6.1.153-1 (bookworm)
linuxlinux
linuxlinux>= be77196b809cdce8603a5aadd5e3cfabd3cbef96 < 73697928c806fe4689939722184a86fc1c1957b473697928c806fe4689939722184a86fc1c1957b4
linuxlinux>= be77196b809cdce8603a5aadd5e3cfabd3cbef96 < f47c834a9131ae64bee3c462f4e610c67b0a000ff47c834a9131ae64bee3c462f4e610c67b0a000f
linuxlinux>= be77196b809cdce8603a5aadd5e3cfabd3cbef96 < adcde2872f8fc399b249758ae1990dcd53b694eaadcde2872f8fc399b249758ae1990dcd53b694ea
linuxlinux>= be77196b809cdce8603a5aadd5e3cfabd3cbef96 < 974e3fe0ac61de85015bbe5a4990cf4127b304b2974e3fe0ac61de85015bbe5a4990cf4127b304b2
linuxlinux_kernel< 6.1.1516.1.151
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.153-16.1.153-1
linuxlinux_kernel>= 0 < 6.12.10-16.12.10-1
linuxlinux_kernel>= 0 < 6.12.10-16.12.10-1
linuxlinux_kernel>= 0 < 6.8.0-62.656.8.0-62.65
linuxlinux_kernel>= 6.2 < 6.6.746.6.74
linuxlinux_kernel>= 6.7 < 6.12.106.12.10

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.9MEDIUM
vendor_ubuntu5.9MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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