Linux Kernel up to 6.7.3 rnbd-srv dev_search_path buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.7.3. The impacted element is the function dev_search_path of the component rnbd-srv. Performing a manipulation results in buffer overflow. This vulnerability is identified as CVE-2023-52618. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.7.3. This affects the function dev_search_path of the component rnbd-srv. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: block/rnbd-srv: Check for unlikely string overflow Since "dev_search_path" can technically be as large as PATH_MAX, there was a risk of truncation when copying it and a second string into "full_path" since it was also PATH_MAX sized. The W=1 builds were reporting this warning: drivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra': drivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=] 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~ In function 'rnbd_srv_get_full_path', inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 617 | dev_search_path, dev_name); | ~~~~~~~~~~~~~~~~~~~~~~~~~~ To fix this, unconditionally check for truncation (as was already done for the case where "%SESSNAME%" was present).

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-52618 since 03/06/2024. The exploitability is told to be easy. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 237278 (Alibaba Cloud Linux 3 : 0075: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2025:0075)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.210, 5.15.149, 6.1.77, 6.6.16, 6.7.4 or 6.8 eliminates this vulnerability. Applying the patch 95bc866c1197/f6abd5e17da3/af7bbdac8973/5b9ea86e6620/a2c6206f1810/9e4bf6a08d1e 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 (237278). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

CNA Base Score: 5.3
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 237278
Nessus Name: Alibaba Cloud Linux 3 : 0075: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2025:0075)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.10.210/5.15.149/6.1.77/6.6.16/6.7.4/6.8
Patch: 95bc866c1197/f6abd5e17da3/af7bbdac8973/5b9ea86e6620/a2c6206f1810/9e4bf6a08d1e

Timelineinfo

03/06/2024 🔍
03/18/2024 +12 days 🔍
03/18/2024 +0 days 🔍
05/27/2025 +435 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-52618 (🔍)
GCVE (CVE): GCVE-0-2023-52618
GCVE (VulDB): GCVE-100-257121

Entryinfo

Created: 03/18/2024 13:59
Updated: 05/27/2025 13:43
Changes: 03/18/2024 13:59 (58), 06/26/2024 13:34 (1), 11/07/2024 02:13 (11), 05/27/2025 13:43 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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