{"id":"CVE-2026-52979","summary":"net: psp: check for device unregister when creating assoc","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: check for device unregister when creating assoc\n\npsp_assoc_device_get_locked() obtains a psp_dev reference via\npsp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU);\nit then acquires psd-\u003elock and drops the reference. Before\nthe lock is taken, psp_dev_unregister() can run to completion:\ntake psd-\u003elock, clear out state, unlock, drop the registration\nreference.\n\nThe expectation is that the lock prevents device unregistration,\nbut much like with netdevs special care has to be taken when\n\"upgrading\" a reference to a locked device. Add the missing\ncheck if device is still alive. psp_dev_is_registered() exists\nalready but had no callers, which makes me wonder if I either\nforgot to add this or lost the check during refactoring...","modified":"2026-07-12T03:55:09.067509691Z","published":"2026-06-24T16:28:55.696Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52979.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/b89769f936a8fa9e66de72ddc1b71a9745a488e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52979.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52979"},{"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":"6b46ca260e2290e3453d1355ab5b6d283d73d780"},{"fixed":"d90df5ce6deb2424de3ad89bcc693ac1b67accc9"},{"fixed":"e201c57073e624dd2ba5beaf9eda31e19b77b332"},{"fixed":"b89769f936a8fa9e66de72ddc1b71a9745a488e6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52979.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.33"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52979.json"}}],"schema_version":"1.7.5"}