Linux Kernel up to 5.13.2 lib/seq_buf.c seq_buf_putmem_hex buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 5.13.2. This affects the function seq_buf_putmem_hex in the library lib/seq_buf.c. Such manipulation leads to buffer overflow. This vulnerability is documented as CVE-2023-28772. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.13.2 (Operating System). It has been rated as critical. Affected by this issue is the function seq_buf_putmem_hex in the library lib/seq_buf.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer overflow.

The weakness was released 03/23/2023 as d3b16034a24a112bb83aeb669ac5b9b01f744bb7. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-28772. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239841 (TencentOS Server 4: kernel (TSSA-2024:0960)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.13.3 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch d3b16034a24a112bb83aeb669ac5b9b01f744bb7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (239841). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 239841
Nessus Name: TencentOS Server 4: kernel (TSSA-2024:0960)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.13.3
Patch: d3b16034a24a112bb83aeb669ac5b9b01f744bb7

Timelineinfo

03/23/2023 🔍
03/23/2023 +0 days 🔍
03/23/2023 +0 days 🔍
06/19/2025 +819 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: d3b16034a24a112bb83aeb669ac5b9b01f744bb7
Status: Confirmed

CVE: CVE-2023-28772 (🔍)
GCVE (CVE): GCVE-0-2023-28772
GCVE (VulDB): GCVE-100-223676

Entryinfo

Created: 03/23/2023 16:41
Updated: 06/19/2025 20:13
Changes: 03/23/2023 16:41 (45), 04/13/2023 10:12 (1), 04/13/2023 10:18 (11), 06/19/2025 20:13 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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