https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 03:49:11 +0000 https://vulnerability.circl.lu/vuln/cve-2026-89709 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>lockd, nfsd: RCU-protect nlmsvc_ops dispatch</p> <p>nlmsvc_ops is published by nfsd_lockd_init() and cleared by nfsd_lockd_shutdown() with plain stores, while lockd dereferences it unguarded from dispatch sites in fs/lockd/svcsubs.c. The pointer targets nfsd&#39;s .rodata and the fopen/fclose callbacks live in nfsd&#39;s .text, so a stale load after rmmod nfsd results in either a NULL deref or a module-text use-after-free.</p> <p>Declare nlmsvc_ops as __rcu, publish via rcu_assign_pointer(), clear via RCU_INIT_POINTER() + synchronize_rcu(). Add a struct module *owner field to nlmsvc_binding and pin the module across indirect calls with try_module_get/module_put. When the binding is torn down, fall back to fput() to avoid leaking struct file references.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>lockd, nfsd: RCU-protect nlmsvc_ops dispatch</p> <p>nlmsvc_ops is published by nfsd_lockd_init() and cleared by nfsd_lockd_shutdown() with plain stores, while lockd dereferences it unguarded from dispatch sites in fs/lockd/svcsubs.c. The pointer targets nfsd&#39;s .rodata and the fopen/fclose callbacks live in nfsd&#39;s .text, so a stale load after rmmod nfsd results in either a NULL deref or a module-text use-after-free.</p> <p>Declare nlmsvc_ops as __rcu, publish via rcu_assign_pointer(), clear via RCU_INIT_POINTER() + synchronize_rcu(). Add a struct module *owner field to nlmsvc_binding and pin the module across indirect calls with try_module_get/module_put. When the binding is torn down, fall back to fput() to avoid leaking struct file references.</p> https://vulnerability.circl.lu/vuln/cve-2026-89709