CVE-2021-47297 (GCVE-0-2021-47297)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2026-05-11 13:51
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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]
References
Impacted products
Vendor Product Version
Linux Linux Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
Version: bece7b2398d073d11b2e352405a3ecd3a1e39c60
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