nvmet: fix a possible leak when destroy a ctrl during qp establishment

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-42152
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-07-30 08:15:06 UTC
Updated2026-08-04 11:19:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nvmet: fix a possible leak when destroy a ctrl during qp establishment In nvmet_sq_destroy we capture sq->ctrl early and if it is non-NULL we know that a ctrl was allocated (in the admin connect request handler) and we need to release pending AERs, clear ctrl->sqs and sq->ctrl (for nvme-loop primarily), and drop the final reference on the ctrl. However, a small window is possible where nvmet_sq_destroy starts (as a result of the client giving up and disconnecting) concurrently with the nvme admin connect cmd (which may be in an early stage). But *before* kill_and_confirm of sq->ref (i.e. the admin connect managed to get an sq live reference). In this case, sq->ctrl was allocated however after it was captured in a local variable in nvmet_sq_destroy. This prevented the final reference drop on the ctrl. Solve this by re-capturing the sq->ctrl after all inflight request has completed, where for sure sq->ctrl reference is final, and move forward based on that. This issue was observed in an environment with many hosts connecting multiple ctrls simoutanuosly, creating a delay in allocating a ctrl leading up to this race window.

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from [email protected]

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

Problem Types: CWE-401

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a 2f3c22b1d3d7e86712253244797a651998c141fa git Not specified
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5 git Not specified
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a 940a71f08ef153ef807f751310b0648d1fa5d0da git Not specified
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a 5502c1f1d0d7472706cc1f201aecf1c935d302d1 git Not specified
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a 818004f2a380420c19872171be716174d4985e33 git Not specified
CNA Linux Linux affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4 git Not specified
CNA Linux Linux affected 5.6 Not specified
CNA Linux Linux unaffected 5.6 semver Not specified
CNA Linux Linux unaffected 5.10.222 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.163 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.98 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.39 6.6.* semver Not specified
CNA Linux Linux unaffected 6.9.9 6.9.* semver Not specified
CNA Linux Linux unaffected 6.10 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141fa af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0da af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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