CVE-2026-43273

Summary

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

ceph: supply snapshot context in ceph_zero_partial_object()

The ceph_zero_partial_object 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.fs_a mds 'allow rwps fsname=a' mon 'allow r fsname=a' osd 'allow rw tag cephfs data=a' mount -t ceph fs_a@.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

Weaknesses

References

• https://git.kernel.org/stable/c/36673344b41c31fb502dd0d0113cec1aa96f581e
• https://git.kernel.org/stable/c/5788b742007f53406049bef917833a71ddd43f60
• https://git.kernel.org/stable/c/757873abfc8ea38592582180aed0f57f0f0cb07a
• https://git.kernel.org/stable/c/9efa154609cdb658f51c7d76b30a09f7e6485250
• https://git.kernel.org/stable/c/531a76c5a2e44264cee8a70121e63eb28c1ba728
• https://git.kernel.org/stable/c/69e59a87bab0ea31ab2a584fc65e12dafacf8953
• https://git.kernel.org/stable/c/4097e70fc543cca72982854108a32f6ae924e727
• https://git.kernel.org/stable/c/f16bd3fa74a2084ee7e16a8a2be7e7399b970907

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