🛡️ CVE-2022-21546 — debian-linux

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-476 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2022-21546 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2022-21546 is recorded against 2 packages.

  • debian-linux
  • linux-kernel

Timeline and source

Published on 2 May 2025 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org

CVE-2022-21546 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-476
Public Exploit ✅ No
Source NVD
Published 2025-05-02
Updated 2026-08-11
Modified 2026-08-04

Affected Packages

Software From version Fixed in
debian-linux — —
linux-kernel — —

Similar Threats

Site Security Check

Is debian-linux part of your stack?

CVE-2022-21546 is rated CVSS 7.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.