Unscored severity · published Oct 28, 2026
CVE-2026-99157
scsi: bsg: Pass reply_len to bsg_setup_queue() to fit UFS ARPMB replies
New
–
CVSS
–
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
6ff265fc5ef660499e0edc4641647e99eed3f519 before 2effbe746452c108188f85a6951f2b0b65653840; 6ff265fc5ef660499e0edc4641647e99eed3f519 before 7a755f6d47b811d3abd93c1642ce5e63894540b8; 6ff265fc5ef660499e0edc4641647e99eed3f519 before ec6b083915e8146e147314a5f4f1285d07b57bfc; 6.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-99157
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-99157
git.kernel.org
https://git.kernel.org/stable/c/2effbe746452c108188f85a6951f2b0b65653840
git.kernel.org
https://git.kernel.org/stable/c/7a755f6d47b811d3abd93c1642ce5e63894540b8
git.kernel.org
https://git.kernel.org/stable/c/ec6b083915e8146e147314a5f4f1285d07b57bfc
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