Bug 2562735 (CVE-2026-99157) - CVE-2026-99157 kernel: kernel: Denial of Service via out-of-bounds write in UFS BSG request handling
Summary: CVE-2026-99157 kernel: kernel: Denial of Service via out-of-bounds write in U...
Keywords:
Status: NEW
Alias: CVE-2026-99157
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-28 10:59 UTC by OSIDB Bzimport
Modified: 2026-11-01 15:24 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-28 10:59:16 UTC
In the Linux kernel, the following vulnerability has been resolved:

scsi: bsg: Pass reply_len to bsg_setup_queue() to fit UFS ARPMB replies

bsg-lib allocates a 96-byte (SCSI_SENSE_BUFFERSIZE) reply buffer per
job, but struct ufs_rpmb_reply is 104 bytes: a 40-byte struct
ufs_bsg_reply followed by a 64-byte EHS. When an Advanced RPMB command
returns an EHS, ufshcd_advanced_rpmb_req_handler() copies it right after
the 40-byte header and writes 8 bytes past the end of the buffer.

Let each BSG transport pass its reply buffer size to bsg_setup_queue()
and have ufs_bsg request sizeof(struct ufs_rpmb_reply), so the full
reply reaches user space. Other transports keep SCSI_SENSE_BUFFERSIZE.


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