CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's key management system, specifically in the handling of request_key_auth payloads during instantiation paths. This flaw can lead to a use-after-free condition, potentially allowing an attacker to execute arbitrary code or escalate privileges. Organizations utilizing Linux systems, particularly those with custom key management implementations, should prioritize patching this vulnerability to mitigate the associated risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: keys: Pin request_key_auth payload in instantiate paths A: request_key() B: KEYCTL_INSTANTIATE_IOV ================ ========================= create auth key store rka in auth key wait for helper get auth key load rka from auth key copy user payload sleep on #PF helper completed detach and free rka destroy auth key wake up use rka->target_key **USE-AFTER-FREE** Give request_key_auth payloads a refcount. Take a payload reference while authkey->sem stabilizes the payload and revocation state. Hold that reference across the instantiate and reject paths. Drop the auth key owning reference from revoke and destroy. [jarkko: Replaced the first two paragraphs of text with an actual concurrency scenario.]