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 "sgwritesame --ndob" we will crash in targetcoreiblock/file's executewritesame handlers when we go to access the secmd->tdata_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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21546.json",
"cna_assigner": "oracle",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43"
},
{
"fixed": "54e57be2573cf0b8bf650375fd8752987b6c3d3b"
},
{
"introduced": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43"
},
{
"fixed": "d8e6a27e9238dd294d6f2f401655f300dca20899"
},
{
"introduced": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43"
},
{
"fixed": "4226622647e3e5ac06d3ebc1605b917446157510"
},
{
"introduced": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43"
},
{
"fixed": "ccd3f449052449a917a3e577d8ba0368f43b8f29"
}
],
"source": "AFFECTED_FIELD"
}
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "3.8"
}
],
"source": "AFFECTED_FIELD"
}