{"id":"CVE-2026-90079","summary":"octeontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()\n\nrvu_mbox_init() is called separately for AF-PF mailboxes during probe\nand for AF-VF mailboxes when SR-IOV is enabled.  Each call used to\nallocate a new ng_rvu object, leaking the first allocation when the\npointer was overwritten on the second call.\n\nSharing one ng_rvu across both paths exposed several teardown bugs:\nthe error path freed all cn20k mailbox DMA and kfree()d ng_rvu even\nwhen only the failing init type should be unwound, leaving live AF-PF\nmailbox memory in use after an AF-VF init failure.  mutex_init() was\nalso re-run on the AF-VF path while AF-PF mailbox handlers could still\nhold rvu-\u003embox_lock.  Probe and SR-IOV failure paths did not release\ncn20k mailbox DMA either, since cleanup only happened in rvu_remove().\n\nAllocate ng_rvu once with devm_kzalloc(), initialize mbox_lock in the\nsame block, unwind only the mailbox memory for the failing init type,\nand free cn20k mailbox DMA from the probe and pci_enable_sriov()\nerror paths.","modified":"2026-09-19T03:47:23.805661662Z","published":"2026-09-17T16:05:57.541Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90079.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3b11a77f69980932c3924054d66e565c9a135747"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a0fcbea79f034f49bdd44915f28938922023458d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90079.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90079"},{"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":"e53ee4acb220acab6832669334279367b0206af6"},{"fixed":"a0fcbea79f034f49bdd44915f28938922023458d"},{"fixed":"3b11a77f69980932c3924054d66e565c9a135747"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90079.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.17.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90079.json"}}],"schema_version":"1.9.0"}