Linux Kernel up to 7.2.3 SMB Client DFS Cache get_tgt_name tgthint null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.16-

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.1.187/6.6.156/6.12.108/6.18.49/7.2.3. The impacted element is the function get_tgt_name of the component SMB Client DFS Cache. The manipulation of the argument tgthint results in null pointer dereference. This vulnerability is identified as CVE-2026-93210. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.187/6.6.156/6.12.108/6.18.49/7.2.3. It has been classified as critical. Affected is the function get_tgt_name of the component SMB Client DFS Cache. The manipulation of the argument tgthint with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden DFS cache against invalid target hints Currently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce->tgthint is NULL, and dfs_cache_noreq_update_tgthint() assumes ce->tgthint is always valid. In preparation for clearing ce->tgthint in free_tgts(), harden callers of get_tgt_name() against ERR_PTR results and harden dfs_cache_noreq_update_tgthint() against NULL pointer dereferences.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-93210 since 09/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 09/24/2026).

Upgrading to version 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4 or 7.3-rc1 eliminates this vulnerability. Applying the patch a48328afbc3f63e3b9de8827e2e16c15b17976f7/6cb7f9fed8f40f28fbd464ca99c946951afc0952/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d/846f0709559b9e27024e126a80bc7afb76516912/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2/bf86c08123c6ab8c61cc0be1dad7540db93738ff is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
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 6.1.188/6.6.157/6.12.109/6.18.50/7.2.4/7.3-rc1
Patch: a48328afbc3f63e3b9de8827e2e16c15b17976f7/6cb7f9fed8f40f28fbd464ca99c946951afc0952/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d/846f0709559b9e27024e126a80bc7afb76516912/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2/bf86c08123c6ab8c61cc0be1dad7540db93738ff

Timelineinfo

09/17/2026 CVE reserved
09/24/2026 +7 days Advisory disclosed
09/24/2026 +0 days VulDB entry created
09/24/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-93210 (🔒)
GCVE (CVE): GCVE-0-2026-93210
GCVE (VulDB): GCVE-100-409416

Entryinfo

Created: 09/24/2026 17:45
Changes: 09/24/2026 17:45 (60)
Complete: 🔍
Cache ID: 216::103

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