CVE-2026-43273: Linux kernel · ceph: supply snapshot context in ceph_zero_partial_object()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f16bd3fa74a2084ee7e16a8a2be7e7399b970907 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 15:49 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f16bd3fa74a2084ee7e16a8a2be7e7399b970907, 36673344b41c31fb502dd0d0113cec1aa96f581e, 757873abfc8ea38592582180aed0f57f0f0cb07a +5
Exploitation evidence
Disclosed: evidence found.
CVE published 6 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
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!!
References
- git.kernel.org/stable/c/36673344b41c31fb502dd0d0113cec1aa96f581e (opens in a new tab)
- git.kernel.org/stable/c/5788b742007f53406049bef917833a71ddd43f60 (opens in a new tab)
- git.kernel.org/stable/c/757873abfc8ea38592582180aed0f57f0f0cb07a (opens in a new tab)
- git.kernel.org/stable/c/9efa154609cdb658f51c7d76b30a09f7e6485250 (opens in a new tab)
- git.kernel.org/stable/c/531a76c5a2e44264cee8a70121e63eb28c1ba728 (opens in a new tab)
- git.kernel.org/stable/c/69e59a87bab0ea31ab2a584fc65e12dafacf8953 (opens in a new tab)
- git.kernel.org/stable/c/4097e70fc543cca72982854108a32f6ae924e727 (opens in a new tab)
- git.kernel.org/stable/c/f16bd3fa74a2084ee7e16a8a2be7e7399b970907 (opens in a new tab)