Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 SMB Client smb2_unlink 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 has been found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 and classified as critical. This impacts the function smb2_unlink of the component SMB Client. This manipulation causes an unknown weakness. The identification of this vulnerability is CVE-2026-23282. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc2. Affected by this vulnerability is the function smb2_unlink of the component SMB Client. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix oops due to uninitialised var in smb2_unlink() If SMB2_open_init() or SMB2_close_init() fails (e.g. reconnect), the iovs set @rqst will be left uninitialised, hence calling SMB2_open_free(), SMB2_close_free() or smb2_set_related() on them will oops. Fix this by initialising @close_iov and @open_iov before setting them in @rqst.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-23282 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/29/2026).

Upgrading to version 6.18.17, 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 86163b98891aa9800f6103252e5acc7bb98afb91/dc710c87af3341554d02d634ada1d2036c49a94a/048efe129a297256d3c2088cf8d79515ff5ec864 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 CERT Bund (WID-SEC-2026-0861). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.17/6.19.7/7.0-rc3
Patch: 86163b98891aa9800f6103252e5acc7bb98afb91/dc710c87af3341554d02d634ada1d2036c49a94a/048efe129a297256d3c2088cf8d79515ff5ec864

Timelineinfo

01/13/2026 CVE reserved
03/25/2026 +71 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/29/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23282 (🔒)
GCVE (CVE): GCVE-0-2026-23282
GCVE (VulDB): GCVE-100-352999
CERT Bund: WID-SEC-2026-0861 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/25/2026 12:05
Updated: 03/29/2026 23:37
Changes: 03/25/2026 12:05 (58), 03/25/2026 19:23 (7), 03/29/2026 23:37 (1)
Complete: 🔍
Cache ID: 216:A56:103

Be aware that VulDB is the high quality source for vulnerability data.

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