rds: ib: use rds_conn_drop() on protocol version mismatch

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98257
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:14 UTC
Updated2026-10-19 10:18:26 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: rds: ib: use rds_conn_drop() on protocol version mismatch rds_ib_cm_connect_complete() runs from the RDMA-CM event handler with conn->c_cm_lock held. When the peer negotiates a protocol version older than RDS_PROTOCOL_COMPAT_VERSION, the handler calls rds_conn_destroy(), which is only safe in the rmmod path: it synchronously tears the connection down and flush_work()es the shutdown work cp_down_w. That shutdown work (rds_conn_shutdown()) needs cp_cm_lock, which is the very lock the event handler still holds, so the flush never completes: the two workers wait on each other and the RDS connection workqueues stall for good. All other RDMA-CM failure paths (REJECTED, CONNECT_ERROR, DISCONNECTED) use rds_conn_drop(), which marks the connection RDS_CONN_ERROR and schedules the shutdown work asynchronously. Use it here as well.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001840000 probability, percentile 0.073040000 (date 2026-10-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde 424019be3f637da76b74f44a40034669acbb166f git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde 14fb90067d13f4494cff0f03243fae3cf2911cbc git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde 344c72a0bc2703a6de4918ed935850e07dae3af2 git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde b5c9f2951d330d4a198a64d6e60f79b4bd6ef078 git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde d392b16acd0908f077289aad8bba066ff16de336 git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde 65ca0a5037152a5a80b8fe6aac80eb80458be573 git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde 7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8 git Not specified
CNA Linux Linux affected f147dd9ecabf23fd63d2562ffe64252a0453ecde f97d8c7bab7843631206a114986c9059da03efeb git Not specified
CNA Linux Linux affected 2.6.37 Not specified
CNA Linux Linux unaffected 2.6.37 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/424019be3f637da76b74f44a40034669acbb166f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14fb90067d13f4494cff0f03243fae3cf2911cbc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f97d8c7bab7843631206a114986c9059da03efeb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/65ca0a5037152a5a80b8fe6aac80eb80458be573 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d392b16acd0908f077289aad8bba066ff16de336 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/344c72a0bc2703a6de4918ed935850e07dae3af2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b5c9f2951d330d4a198a64d6e60f79b4bd6ef078 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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