Riskcovery

CVE-2022-21546

scsi: target: Fix WRITE_SAME No Data Buffer crash

State
Published
Severity
7.5 High
Published
May 2, 2025
Updated
Aug 5, 2026
Reserved
Nov 15, 2021

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • f6970ad31d42fceb38b5595cbad093a4d0bfcc43 to before 54e57be2573cf0b8bf650375fd8752987b6c3d3bAffected
  • f6970ad31d42fceb38b5595cbad093a4d0bfcc43 to before d8e6a27e9238dd294d6f2f401655f300dca20899Affected
  • f6970ad31d42fceb38b5595cbad093a4d0bfcc43 to before 4226622647e3e5ac06d3ebc1605b917446157510Affected
  • f6970ad31d42fceb38b5595cbad093a4d0bfcc43 to before ccd3f449052449a917a3e577d8ba0368f43b8f29Affected
LinuxLinux
  • 3.8Affected
  • before 3.8Not affected
  • 5.4.294 through 5.4.*Not affected
  • 5.10.238 through 5.10.*Not affected
  • 5.15.182 through 5.15.*Not affected
  • 5.19 and laterNot affected

References

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