CVE-2026-43273: ceph: supply snapshot context in ceph_zero_partial_object()
In the Linux kernel, the following vulnerability has been resolved:
ceph: supply snapshot context in cephzeropartialobject()
The cephzeropartialobject function was missing proper snapshot context for its OSD write operations, which could lead to data inconsistencies in snapshots.
Reproducer: ../src/vstart.sh --new -x --localhost --bluestore ./bin/ceph auth caps client.fsa mds 'allow rwps fsname=a' mon 'allow r fsname=a' osd 'allow rw tag cephfs data=a' mount -t ceph fsa@.a=/ /mnt/mycephfs/ -o conf=./ceph.conf dd if=/dev/urandom of=/mnt/mycephfs/foo bs=64K count=1 mkdir /mnt/mycephfs/.snap/snap1 md5sum /mnt/mycephfs/.snap/snap1/foo fallocate -p -o 0 -l 4096 /mnt/mycephfs/foo echo 3 > /proc/sys/vm/drop/caches md5sum /mnt/mycephfs/.snap/snap1/foo # get different md5sum!!
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43273?
CVE-2026-43273 is a medium-severity vulnerability in the Ceph component of the Linux kernel.
How do I fix CVE-2026-43273?
To fix CVE-2026-43273, ensure that your Linux kernel is updated to the latest version that addresses this vulnerability.
What are the potential impacts of CVE-2026-43273?
CVE-2026-43273 may lead to improper handling of OSD write operations, potentially compromising data integrity.
Which software versions are affected by CVE-2026-43273?
CVE-2026-43273 affects certain versions of the Linux kernel where the Ceph subsystem is utilized.
Is there a workaround for CVE-2026-43273?
Currently, there are no specific workarounds documented for CVE-2026-43273 beyond applying the necessary updates.