Oracle Linux/VM sg_write_same buffer overflow

Summaryinfo

A vulnerability labeled as critical has been found in Oracle Linux and VM. This impacts the function sg_write_same. The manipulation results in buffer overflow. This vulnerability was named CVE-2022-21546. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Oracle Linux and VM (the affected version unknown). It has been classified as critical. Affected is the function sg_write_same. 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 availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix WRITE_SAME No Data Buffer crash In newer version of the SBC specs, we have a NDOB bit that indicates there is no data buffer that gets written out. If this bit is set using commands like "sg_write_same --ndob" we will crash in target_core_iblock/file's execute_write_same handlers when we go to access the se_cmd->t_data_sg because its NULL. This patch adds a check for the NDOB bit in the common WRITE SAME code because we don't support it. And, it adds a check for zero SG elements in each handler in case the initiator tries to send a normal WRITE SAME with no data buffer.

The advisory is available at linux.oracle.com. This vulnerability is traded as CVE-2022-21546 since 11/15/2021. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 01/31/2026).

The vulnerability scanner Nessus provides a plugin with the ID 237508 (Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-072)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (237508) and CERT Bund (WID-SEC-2025-0991). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Dell Avamar
• Open Source Linux Kernel
• Dell NetWorker
• Dell Secure Connect Gateway

Productinfo

Vendor

• Oracle

Name

• Linux
• VM

License

• open-source

Website

• Vendor: https://www.oracle.com

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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