CVE-2021-47297
Linux Kernel Caif Sequence Packet Uninit-Value Disclosure
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]
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
April 2, 2025, 2:42 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47297.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47297 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47297 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Apr. 02, 2025
Action Type Old Value New Value Added CWE CWE-908 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.277 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.241 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.199 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.136 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.35 up to (excluding) 4.4.277 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.54 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.13.6 Added Reference Type CVE: https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff Added Reference https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 Added Reference https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db Added Reference https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d Added Reference https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 Added Reference https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 Added Reference https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 Added Reference https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 06, 2024
Action Type Old Value New Value Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added 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] Added Reference kernel.org https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47297 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47297
weaknesses.