{"id":"CVE-2024-27435","summary":"nvme: fix reconnection fail due to reserved tag allocation","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix reconnection fail due to reserved tag allocation\n\nWe found a issue on production environment while using NVMe over RDMA,\nadmin_q reconnect failed forever while remote target and network is ok.\nAfter dig into it, we found it may caused by a ABBA deadlock due to tag\nallocation. In my case, the tag was hold by a keep alive request\nwaiting inside admin_q, as we quiesced admin_q while reset ctrl, so the\nrequest maked as idle and will not process before reset success. As\nfabric_q shares tagset with admin_q, while reconnect remote target, we\nneed a tag for connect command, but the only one reserved tag was held\nby keep alive command which waiting inside admin_q. As a result, we\nfailed to reconnect admin_q forever. In order to fix this issue, I\nthink we should keep two reserved tags for admin queue.","modified":"2026-04-02T10:07:58.358286Z","published":"2024-05-17T12:12:36.439Z","related":["ALSA-2024:4583","SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27435.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27435.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-27435"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ed01fee283a067c72b2d6500046080dbc1bb9dae"},{"fixed":"149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8"},{"fixed":"ff2f90f88d78559802466ad1c84ac5bda4416b3a"},{"fixed":"6851778504cdb49431809b4ba061903d5f592c96"},{"fixed":"262da920896e2f2ab0e3947d9dbee0aa09045818"},{"fixed":"de105068fead55ed5c07ade75e9c8e7f86a00d1d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27435.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}