CVE-2022-21546

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.

CVSS Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.07%• Percentile: 21%

Techniques & Countermeasures

• CWE-476•NULL Pointer Dereference

  The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

• debian•debian_linux

  11.0

• linux•linux

  ≥ f6970ad31d42fceb38b5595cbad093a4d0bfcc43, < 54e57be2573cf0b8bf650375fd8752987b6c3d3b | ≥ f6970ad31d42fceb38b5595cbad093a4d0bfcc43, < d8e6a27e9238dd294d6f2f401655f300dca20899 | ≥ f6970ad31d42fceb38b5595cbad093a4d0bfcc43, < 4226622647e3e5ac06d3ebc1605b917446157510 | ≥ f6970ad31d42fceb38b5595cbad093a4d0bfcc43, < ccd3f449052449a917a3e577d8ba0368f43b8f29 | 3.8

• linux•linux_kernel

  < 5.4.294 | ≥ 5.5, < 5.10.238 | ≥ 5.11, < 5.15.182 | ≥ 5.16, < 5.19 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4 | 5.19:rc5 | 5.19:rc6

References (5)

• https://git.kernel.org/stable/c/54e57be2573cf0b8bf650375fd8752987b6c3d3b
• https://git.kernel.org/stable/c/d8e6a27e9238dd294d6f2f401655f300dca20899
• https://git.kernel.org/stable/c/4226622647e3e5ac06d3ebc1605b917446157510
• https://git.kernel.org/stable/c/ccd3f449052449a917a3e577d8ba0368f43b8f29
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html