发布于3月6日3月6日 Members SUSE: CVE-2021-47297: SUSE Linux Security Advisory Severity 4 CVSS (AV:L/AC:M/Au:N/C:P/I:P/A:P) Published 05/21/2024 Created 08/16/2024 Added 08/09/2024 Modified 08/09/2024 Description In the Linux kernel, the following vulnerability has been resolved: net: fix uninit-value in caif_seqpkt_sendmsg When nr_segs equal to zero in iovec_from_user, the object msg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg which is defined in ___sys_sendmsg. So we cann't just judge msg->msg_iter.iov->base directlly. We can use nr_segs to judge msg in caif_seqpkt_sendmsg whether has data buffers. ===================================================== BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmmsg+0x808/0xc90 net/socket.c:2480 __compat_sys_sendmmsg net/compat.c:656 [inline] Solution(s) suse-upgrade-kernel-azure suse-upgrade-kernel-azure-base suse-upgrade-kernel-azure-devel suse-upgrade-kernel-default suse-upgrade-kernel-default-base suse-upgrade-kernel-default-devel suse-upgrade-kernel-default-extra suse-upgrade-kernel-default-man suse-upgrade-kernel-devel suse-upgrade-kernel-devel-azure suse-upgrade-kernel-docs suse-upgrade-kernel-macros suse-upgrade-kernel-obs-build suse-upgrade-kernel-source suse-upgrade-kernel-source-azure suse-upgrade-kernel-syms suse-upgrade-kernel-syms-azure References https://attackerkb.com/topics/cve-2021-47297 CVE - 2021-47297
