{"id":"CVE-2026-90077","summary":"net: fix a resource leak in copy_net_ns() error handling path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix a resource leak in copy_net_ns() error handling path\n\nCurrently, preinit_net() does two things:\n\n  (1) call ns_common_init() which might fail\n  (2) initialize resources which does not fail\n\nHowever, preinit_net() is returning early when (1) fails, and copy_net_ns()\nis jumping to the dec_ucounts: label. As a result, resources allocated by\nnet_alloc() are leaking. We need to call key_remove_domain() and\nnet_passive_dec() in order to release resources allocated by net_alloc().\n\nWe cannot simply jump to the put_userns: label when preinit_net() failed,\nfor (2) is not yet done. But we can reorder (1) and (2), for there is no\ndependency between (1) and (2). Therefore, this patch decouples (1) from\npreinit_net() and changes preinit_net() back to a void function, and calls\nns_common_init() after preinit_net() succeeded. Then, we can jump to\nimmediately after ns_common_free() of the put_userns: label.","modified":"2026-09-18T03:48:35.251702143Z","published":"2026-09-17T16:05:56.226Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90077.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3220b62fbb8a55feebd2a826d5ead0f49f09ed5a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76c847e80d2b6be047707d58e8e05eedbe2593ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e69bde4eb566aea8fa97cbb93e0bab608964f1a5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90077.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90077"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"08027f6b790be1e444e4182fb4dc53faa6539d16"},{"fixed":"76c847e80d2b6be047707d58e8e05eedbe2593ad"},{"fixed":"e69bde4eb566aea8fa97cbb93e0bab608964f1a5"},{"fixed":"3220b62fbb8a55feebd2a826d5ead0f49f09ed5a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90077.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90077.json"}}],"schema_version":"1.9.0"}