CVE-2025-68297

/// Technical description

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

ceph: fix crash in process_v2_sparse_read() for encrypted directories

The crash in process_v2_sparse_read() for fscrypt-encrypted directories

has been reported. Issue takes place for Ceph msgr2 protocol in secure

mode. It can be reproduced by the steps:

sudo mount -t ceph :/ /mnt/cephfs/ -o name=admin,fs=cephfs,ms_mode=secure

(1) mkdir /mnt/cephfs/fscrypt-test-3

(2) cp area_decrypted.tar /mnt/cephfs/fscrypt-test-3

(3) fscrypt encrypt --source=raw_key --key=./my.key /mnt/cephfs/fscrypt-test-3

(4) fscrypt lock /mnt/cephfs/fscrypt-test-3

(5) fscrypt unlock --key=my.key /mnt/cephfs/fscrypt-test-3

(6) cat /mnt/cephfs/fscrypt-test-3/area_decrypted.tar

(7) Issue has been triggered

[ 408.072247] ------------[ cut here ]------------

[ 408.072251] WARNING: CPU: 1 PID: 392 at net/ceph/messenger_v2.c:865

ceph_con_v2_try_read+0x4b39/0x72f0

[ 408.072267] Modules linked in: intel_rapl_msr intel_rapl_common

intel_uncore_freque

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References