CVE-2022-21546

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf6970ad31d42fceb38b5595cbad093a4d0bfcc43 < 54e57be2573cf0b8bf650375fd8752987b6c3d3baffected
LinuxLinuxf6970ad31d42fceb38b5595cbad093a4d0bfcc43 < d8e6a27e9238dd294d6f2f401655f300dca20899affected
LinuxLinuxf6970ad31d42fceb38b5595cbad093a4d0bfcc43 < 4226622647e3e5ac06d3ebc1605b917446157510affected
LinuxLinuxf6970ad31d42fceb38b5595cbad093a4d0bfcc43 < ccd3f449052449a917a3e577d8ba0368f43b8f29affected
LinuxLinux3.8affected
LinuxLinux0 < 3.8unaffected
LinuxLinux5.4.294 <= 5.4.*unaffected
LinuxLinux5.10.238 <= 5.10.*unaffected
LinuxLinux5.15.182 <= 5.15.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References