Medium 5.5Published May 6, 2026

CVE-2026-43273ceph: supply snapshot context in ceph_zero_partial_object()

Updated under an hour ago (Oct 27, 2026, 4:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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!!

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ad7a60de882aca31afb58721db166f7e77afcd92 before 36673344b41c31fb502dd0d0113cec1aa96f581e; from ad7a60de882aca31afb58721db166f7e77afcd92 before 5788b742007f53406049bef917833a71ddd43f60; from ad7a60de882aca31afb58721db166f7e77afcd92 before 757873abfc8ea38592582180aed0f57f0f0cb07a; from ad7a60de882aca31afb58721db166f7e77afcd92 before 9efa154609cdb658f51c7d76b30a09f7e6485250; from ad7a60de882aca31afb58721db166f7e77afcd92 before 531a76c5a2e44264cee8a70121e63eb28c1ba728; from ad7a60de882aca31afb58721db166f7e77afcd92 before 69e59a87bab0ea31ab2a584fc65e12dafacf8953; from ad7a60de882aca31afb58721db166f7e77afcd92 before 4097e70fc543cca72982854108a32f6ae924e727; from ad7a60de882aca31afb58721db166f7e77afcd92 before f16bd3fa74a2084ee7e16a8a2be7e7399b970907	CNA record
linux linux_kernel linux:linux_kernel	from 3.12 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.