CVE - CVE-2021-47297

CVE-ID
CVE-2021-47297	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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]
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff URL:https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff MISC:https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 URL:https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 MISC:https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db URL:https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db MISC:https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d URL:https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d MISC:https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 URL:https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 MISC:https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 URL:https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 MISC:https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 URL:https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 MISC:https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a URL:https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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