CVE-2026-53186

published 2026-06-25

CVE-2026-53186: In the Linux kernel, the following vulnerability has been resolved: RDMA/srp: bound SRP_RSP sense copy by the received length srp_process_rsp() copies sense…

Priority P3 50 critical 9.1 CVSS 3.1

AV N AC L PR N UI N S U C H I N A H

In the Linux kernel, the following vulnerability has been resolved:

RDMA/srp: bound SRP_RSP sense copy by the received length

srp_process_rsp() copies sense data from rsp->data + resp_data_len,
where resp_data_len is the full 32-bit value supplied by the SRP target
and is never checked against the number of bytes actually received
(wc->byte_len). The copy length is bounded to SCSI_SENSE_BUFFERSIZE, so
at most 96 bytes are copied, but the source offset is not bounded.

A malicious or compromised SRP target on the InfiniBand/RoCE fabric that
the initiator has logged into can return an SRP_RSP with
SRP_RSP_FLAG_SNSVALID set and a large resp_data_len. The receive buffer
is allocated at the target-chosen max_ti_iu_len, so the source of the
sense copy lands past the bytes actually received; with resp_data_len
near 0xFFFFFFFF it is gigabytes past the buffer and the read faults.

Copy the sense data only if it has not been truncated, that is, only if
the response header, the response data, and the sense region fit within
the bytes actually received; otherwise drop the sense and log. The
in-tree iSER and NVMe-RDMA receive paths already bound their parse by
wc->byte_len; this brings ib_srp into line with them.

Affected

23 ranges

Vendor	Product	Version range	Fixed in
linux	linux	—	—
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 3889517c2ec7f364914aea8209abfff735f7ecde	3889517c2ec7f364914aea8209abfff735f7ecde
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < ed77cc819ad631264787cade5ae5ec4c535ec6bb	ed77cc819ad631264787cade5ae5ec4c535ec6bb
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 0b9ee09d5e849591f17d98c078033dadea967293	0b9ee09d5e849591f17d98c078033dadea967293
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 0d64bc200ebe4f275b27438c6e593903e0b16fe1	0d64bc200ebe4f275b27438c6e593903e0b16fe1
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 2015038195939eac54a1ee83c9d98ef1a8ccbbce	2015038195939eac54a1ee83c9d98ef1a8ccbbce
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < f92a285db7ff6e598591ccbfb551be155c5f4d57	f92a285db7ff6e598591ccbfb551be155c5f4d57
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 3523e53ff95f1837ec3f57ff7558532bcb2661b7	3523e53ff95f1837ec3f57ff7558532bcb2661b7
linux	linux	>= aef9ec39c47f0cece886ddd6b53c440321e0b2a6 < 13e91fd076306f5d0cdfa14f53d69e37274723c4	13e91fd076306f5d0cdfa14f53d69e37274723c4
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	—	—
linux	linux_kernel	>= 2.6.15 < 5.10.259	5.10.259
linux	linux_kernel	>= 5.11 < 5.15.210	5.15.210
linux	linux_kernel	>= 5.16 < 6.1.176	6.1.176
linux	linux_kernel	>= 6.13 < 6.18.36	6.18.36
linux	linux_kernel	>= 6.19 < 7.0.13	7.0.13
linux	linux_kernel	>= 6.2 < 6.6.143	6.6.143
linux	linux_kernel	>= 6.7 < 6.12.94	6.12.94

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