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CVE-2022-21546

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.

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
This information is available to logged-in users.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
VendorLinux
≫
Product Linux
Default Statusunaffected
Version < 54e57be2573cf0b8bf650375fd8752987b6c3d3b
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Status affected
Version < d8e6a27e9238dd294d6f2f401655f300dca20899
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Status affected
Version < 4226622647e3e5ac06d3ebc1605b917446157510
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Status affected
Version < ccd3f449052449a917a3e577d8ba0368f43b8f29
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Status affected
VendorLinux
≫
Product Linux
Default Statusaffected
Version <= 5.4.*
Version 5.4.294
Status unaffected
Version <= 5.10.*
Version 5.10.238
Status unaffected
Version <= 5.15.*
Version 5.15.182
Status unaffected
Version <= *
Version 5.19
Status unaffected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.07% 0.205
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
CWE-476 NULL Pointer Dereference

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