Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:virtio/vsock: Fix accept_queue memory leakAs the final stages of socket destruction may be delayed, it is possiblethat virtio_transport_recv_listen() will be called after the accept_queuehas been flushed, but before the SOCK_DONE flag has been set. As a result,sockets enqueued after the flush would remain unremoved, leading to amemory leak.vsock_release __vsock_release lock virtio_transport_release virtio_transport_close schedule_delayed_work(close_work) sk_shutdown = SHUTDOWN_MASK(!) flush accept_queue release virtio_transport_recv_pkt vsock_find_bound_socket lock if flag(SOCK_DONE) return virtio_transport_recv_listen child = vsock_create_connected (!) vsock_enqueue_accept(child) releaseclose_work lock virtio_transport_do_close set_flag(SOCK_DONE) virtio_transport_remove_sock vsock_remove_sock vsock_remove_bound releaseIntroduce a sk_shutdown check to disallow vsock_enqueue_accept() duringsocket destruction.unreferenced object 0xffff888109e3f800 (size 2040): comm "kworker/5:2", pid 371, jiffies 4294940105 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 28 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00 (..@............ backtrace (crc 9e5f4e84): [
No PoCs from references.
- https://github.com/w4zu/Debian_security