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

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Summary

CVECVE-2026-53186
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:36 UTC
Updated2026-06-28 08:16:37 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.001840000 probability, percentile 0.082230000 (date 2026-06-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 3889517c2ec7f364914aea8209abfff735f7ecde git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 ed77cc819ad631264787cade5ae5ec4c535ec6bb git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 0b9ee09d5e849591f17d98c078033dadea967293 git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 0d64bc200ebe4f275b27438c6e593903e0b16fe1 git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 2015038195939eac54a1ee83c9d98ef1a8ccbbce git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 f92a285db7ff6e598591ccbfb551be155c5f4d57 git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 3523e53ff95f1837ec3f57ff7558532bcb2661b7 git Not specified
CNA Linux Linux affected aef9ec39c47f0cece886ddd6b53c440321e0b2a6 13e91fd076306f5d0cdfa14f53d69e37274723c4 git Not specified
CNA Linux Linux affected 2.6.15 Not specified
CNA Linux Linux unaffected 2.6.15 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3889517c2ec7f364914aea8209abfff735f7ecde 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed77cc819ad631264787cade5ae5ec4c535ec6bb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b9ee09d5e849591f17d98c078033dadea967293 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2015038195939eac54a1ee83c9d98ef1a8ccbbce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f92a285db7ff6e598591ccbfb551be155c5f4d57 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3523e53ff95f1837ec3f57ff7558532bcb2661b7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0d64bc200ebe4f275b27438c6e593903e0b16fe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/13e91fd076306f5d0cdfa14f53d69e37274723c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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