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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.11% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 36673344b41c31fb502dd0d0113cec1aa96f581e, 4097e70fc543cca72982854108a32f6ae924e727, 531a76c5a2e44264cee8a70121e63eb28c1ba728.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 36673344b41c31fb502dd0d0113cec1aa96f581e, 4097e70fc543cca72982854108a32f6ae924e727, 531a76c5a2e44264cee8a70121e63eb28c1ba728 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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!!

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-43273

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.12 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.12affected
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 36673344b41c31fb502dd0d0113cec1aa96f581eaffected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 5788b742007f53406049bef917833a71ddd43f60affected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 757873abfc8ea38592582180aed0f57f0f0cb07aaffected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 9efa154609cdb658f51c7d76b30a09f7e6485250affected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 531a76c5a2e44264cee8a70121e63eb28c1ba728affected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 69e59a87bab0ea31ab2a584fc65e12dafacf8953affected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before 4097e70fc543cca72982854108a32f6ae924e727affected · git
    • ad7a60de882aca31afb58721db166f7e77afcd92 and later · before f16bd3fa74a2084ee7e16a8a2be7e7399b970907affected · git
    • before 3.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1
SUSE:Linux Enterprise Module for Legacy 15 SP7cephfsbefore 1.0-150700.15.7.11.0-150700.15.7.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43271May 6, 2026 · md-cluster: fix NULL pointer dereference in process_metadata_update
    22Monitor
  • ← EarlierCVE-2026-43272May 6, 2026 · ring-buffer: Fix possible dereference of uninitialized pointer
    22Monitor
  • Later →CVE-2026-43276May 6, 2026 · net: mana: Fix double destroy_workqueue on service rescan PCI path
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux36673344b41c31fb502dd0d0113cec1aa96f581eVendor (CNA)
Linux Linux4097e70fc543cca72982854108a32f6ae924e727Vendor (CNA)
Linux Linux531a76c5a2e44264cee8a70121e63eb28c1ba728Vendor (CNA)
Linux Linux5788b742007f53406049bef917833a71ddd43f60Vendor (CNA)
Linux Linux69e59a87bab0ea31ab2a584fc65e12dafacf8953Vendor (CNA)
Linux Linux757873abfc8ea38592582180aed0f57f0f0cb07aVendor (CNA)
Linux Linux9efa154609cdb658f51c7d76b30a09f7e6485250Vendor (CNA)
Linux Linuxf16bd3fa74a2084ee7e16a8a2be7e7399b970907Vendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)
suse:cephfs1.0-150700.15.7.1 · SUSE:Linux Enterprise Module for Legacy 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records