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.
How to fix
- linux linux_kernel5.4.294, 5.10.238, 5.15.182, 5.19 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 5.4.294, 5.5 ≤ v < 5.10.238, 5.11 ≤ v < 5.15.182, 5.16 ≤ v < 5.19, 5.19 | 5.4.294, 5.10.238, 5.15.182, 5.19 |
| debian debian_linux | 11.0 | — |
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