CVE-2023-32257

HIGHEPSS 83th pctl

8.1

CVSS v3

Description

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_SESSION_SETUP and SMB2_LOGOFF commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

CWE-362Race Condition CWE-667

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.37-1CVE-2023-32257

Fixed in:6.3.7-1CVE-2023-32257

linuxUbuntu

Fixed in:5.15.0-94.104USN-6626-1

Fixed in:6.2.0-32.32USN-6338-1

linux-awsUbuntu

Fixed in:5.15.0-1053.58USN-6626-1

Fixed in:6.2.0-1011.11USN-6338-1

linux-aws-5.15Ubuntu

Fixed in:5.15.0-1053.58~20.04.1USN-6626-1

linux-aws-6.2Ubuntu

Fixed in:6.2.0-1011.11~22.04.1USN-6338-1

linux-azureUbuntu

Fixed in:5.15.0-1056.64USN-6626-3

Fixed in:6.2.0-1011.11USN-6344-1

linux-azure-5.15Ubuntu

Fixed in:5.15.0-1056.64~20.04.1USN-6626-3

linux-azure-fdeUbuntu

Fixed in:5.15.0-1056.64.1USN-6626-3

linux-azure-fde-5.15Ubuntu

Fixed in:5.15.0-1056.64~20.04.1.1USN-6626-3

linux-gcpUbuntu

Fixed in:5.15.0-1051.59USN-6626-1

Fixed in:6.2.0-1013.13USN-6338-2

linux-gcp-5.15Ubuntu

Fixed in:5.15.0-1051.59~20.04.1USN-6626-1

linux-gcp-6.2Ubuntu

Fixed in:6.2.0-1013.13~22.04.1USN-6338-2

linux-gkeUbuntu

Fixed in:5.15.0-1050.55USN-6626-1

linux-gkeopUbuntu

Fixed in:5.15.0-1036.42USN-6626-1

linux-gkeop-5.15Ubuntu

Fixed in:5.15.0-1036.42~20.04.1USN-6626-1

linux-hwe-5.15Ubuntu

Fixed in:5.15.0-94.104~20.04.1USN-6626-1

linux-hwe-6.2Ubuntu

Fixed in:6.2.0-32.32~22.04.1USN-6338-1

linux-ibmUbuntu

Fixed in:5.15.0-1046.49USN-6626-1

Fixed in:6.2.0-1009.9USN-6338-2

linux-ibm-5.15Ubuntu

Fixed in:5.15.0-1046.49~20.04.1USN-6626-1

linux-image-5.15.0-1036-gkeopUbuntu

Fixed in:5.15.0-1036.42~20.04.1USN-6626-1

Fixed in:5.15.0-1036.42USN-6626-1

linux-image-5.15.0-1044-nvidiaUbuntu

Fixed in:5.15.0-1044.44USN-6626-1

linux-image-5.15.0-1044-nvidia-lowlatencyUbuntu

Fixed in:5.15.0-1044.44USN-6626-1

linux-image-5.15.0-1046-ibmUbuntu

Fixed in:5.15.0-1046.49~20.04.1USN-6626-1

Fixed in:5.15.0-1046.49USN-6626-1

linux-image-5.15.0-1046-raspiUbuntu

Fixed in:5.15.0-1046.49USN-6626-2

linux-image-5.15.0-1047-intel-iotgUbuntu

Fixed in:5.15.0-1047.53USN-6628-1

linux-image-5.15.0-1048-intel-iotgUbuntu

Fixed in:5.15.0-1048.54~20.04.1USN-6628-2

linux-image-5.15.0-1050-gkeUbuntu

Fixed in:5.15.0-1050.55USN-6626-1

linux-image-5.15.0-1050-kvmUbuntu

Fixed in:5.15.0-1050.55USN-6626-1

linux-image-5.15.0-1051-gcpUbuntu

Fixed in:5.15.0-1051.59~20.04.1USN-6626-1

Fixed in:5.15.0-1051.59USN-6626-1

linux-image-5.15.0-1051-oracleUbuntu

Fixed in:5.15.0-1051.57~20.04.1USN-6626-1

Fixed in:5.15.0-1051.57USN-6626-1

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.39%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch2

Third-Party Advisory2

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	Fix

Common questions

How do I fix CVE-2023-32257?

Published advisories record a fix for 108 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-32257 being actively exploited?

Not that we know of. CVE-2023-32257 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 83% of all scored CVEs.

How severe is CVE-2023-32257?

CVE-2023-32257 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-32257 affect?

Published advisories record a fix for linux (Debian), linux (Ubuntu), linux-aws (Ubuntu), linux-aws-5.15 (Ubuntu), and 104 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.