CVE - CVE-2024-42152

CVE-ID
CVE-2024-42152	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In 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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141fa URL:https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141fa MISC:https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1 URL:https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1 MISC:https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33 URL:https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33 MISC:https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0da URL:https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0da MISC:https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5 URL:https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5 MISC:https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4 URL:https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4
Assigning CNA
kernel.org
Date Record Created
20240729	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240729)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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