CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the xfrm subsystem, specifically in the handling of authentication algorithms during state construction. An attacker could exploit this flaw to cause a memory leak, potentially leading to denial-of-service conditions or information disclosure. Organizations using Linux systems, particularly those relying on xfrm for secure communications, should prioritize this issue to mitigate potential risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: fix xfrm_state_construct() auth-trunc leak attach_auth_trunc() can allocate x->aalg while leaving x->props.aalgo at zero when the selected auth algorithm has no sadb_alg_id. One real case is cmac(aes). xfrm_state_construct() then treats !x->props.aalgo as "no auth algorithm attached yet" and calls attach_auth(). That overwrites x->aalg and loses the first allocation. Any later failure or teardown only frees the replacement pointer. Check whether x->aalg is already attached instead of inferring that state from x->props.aalgo.