{"id":"AZL-47685","summary":"CVE-2024-42152 affecting package kernel for versions less than 5.15.164.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix a possible leak when destroy a ctrl during qp establishment\n\nIn nvmet_sq_destroy we capture sq-\u003ectrl early and if it is non-NULL we\nknow that a ctrl was allocated (in the admin connect request handler)\nand we need to release pending AERs, clear ctrl-\u003esqs and sq-\u003ectrl\n(for nvme-loop primarily), and drop the final reference on the ctrl.\n\nHowever, a small window is possible where nvmet_sq_destroy starts (as\na result of the client giving up and disconnecting) concurrently with\nthe nvme admin connect cmd (which may be in an early stage). But *before*\nkill_and_confirm of sq-\u003eref (i.e. the admin connect managed to get an sq\nlive reference). In this case, sq-\u003ectrl was allocated however after it was\ncaptured in a local variable in nvmet_sq_destroy.\nThis prevented the final reference drop on the ctrl.\n\nSolve this by re-capturing the sq-\u003ectrl after all inflight request has\ncompleted, where for sure sq-\u003ectrl reference is final, and move forward\nbased on that.\n\nThis issue was observed in an environment with many hosts connecting\nmultiple ctrls simoutanuosly, creating a delay in allocating a ctrl\nleading up to this race window.","modified":"2026-04-01T05:15:56.007914Z","published":"2024-07-30T08:15:06Z","upstream":["CVE-2024-42152"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-42152"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.164.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-47685.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}