{"id":"CVE-2023-53273","summary":"Drivers: vmbus: Check for channel allocation before looking up relids","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: vmbus: Check for channel allocation before looking up relids\n\nrelid2channel() assumes vmbus channel array to be allocated when called.\nHowever, in cases such as kdump/kexec, not all relids will be reset by the host.\nWhen the second kernel boots and if the guest receives a vmbus interrupt during\nvmbus driver initialization before vmbus_connect() is called, before it finishes,\nor if it fails, the vmbus interrupt service routine is called which in turn calls\nrelid2channel() and can cause a null pointer dereference.\n\nPrint a warning and error out in relid2channel() for a channel id that's invalid\nin the second kernel.","modified":"2026-04-02T09:43:54.786116Z","published":"2025-09-16T08:11:08.792Z","related":["SUSE-SU-2025:03613-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03626-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53273.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53273.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53273"},{"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":"8b6a877c060ed6b86878fe66c7c6493a6054cf23"},{"fixed":"176c6b4889195fbe7016d9401175b48c5c9edf68"},{"fixed":"c373e49fbb87aa177819866ed9194ebc5414dfd6"},{"fixed":"8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee"},{"fixed":"a5c44f3446a0565139b7d8abc78f58b86c398123"},{"fixed":"1eb65c8687316c65140b48fad27133d583178e15"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53273.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"}]}