Linux Kernel up to 6.19.5 ceph /src/vstart.sh ceph_zero_partial_object privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.19.5. Affected is the function ceph_zero_partial_object of the file /src/vstart.sh of the component ceph. The manipulation results in an unknown weakness. This vulnerability is identified as CVE-2026-43273. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.5. It has been classified as critical. Affected is the function ceph_zero_partial_object of the file /src/vstart.sh of the component ceph. The impact remains unknown. CVE summarizes:

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 [email protected]=/ /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!!

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-43273 since 05/01/2026. The exploitability is told to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/04/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318589 (Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50293)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 36673344b41c31fb502dd0d0113cec1aa96f581e/5788b742007f53406049bef917833a71ddd43f60/757873abfc8ea38592582180aed0f57f0f0cb07a/9efa154609cdb658f51c7d76b30a09f7e6485250/531a76c5a2e44264cee8a70121e63eb28c1ba728/69e59a87bab0ea31ab2a584fc65e12dafacf8953/4097e70fc543cca72982854108a32f6ae924e727/f16bd3fa74a2084ee7e16a8a2be7e7399b970907 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (318589). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318589
Nessus Name: Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50293)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.252/5.15.202/6.1.165/6.6.128/6.12.75/6.18.16/6.19.6
Patch: 36673344b41c31fb502dd0d0113cec1aa96f581e/5788b742007f53406049bef917833a71ddd43f60/757873abfc8ea38592582180aed0f57f0f0cb07a/9efa154609cdb658f51c7d76b30a09f7e6485250/531a76c5a2e44264cee8a70121e63eb28c1ba728/69e59a87bab0ea31ab2a584fc65e12dafacf8953/4097e70fc543cca72982854108a32f6ae924e727/f16bd3fa74a2084ee7e16a8a2be7e7399b970907

Timelineinfo

05/01/2026 CVE reserved
05/06/2026 +5 days Advisory disclosed
05/06/2026 +0 days VulDB entry created
06/04/2026 +29 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43273 (🔒)
GCVE (CVE): GCVE-0-2026-43273
GCVE (VulDB): GCVE-100-361536

Entryinfo

Created: 05/06/2026 17:16
Updated: 06/04/2026 14:47
Changes: 05/06/2026 17:16 (59), 06/04/2026 14:47 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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