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
Configurations
Configuration 1 (hide)
|
History
02 Apr 2025, 14:42
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-908 | |
| CPE | 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:*:*:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff - Patch | |
| References | () https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 - Patch | |
| References | () https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db - Patch | |
| References | () https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d - Patch | |
| References | () https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 - Patch | |
| References | () https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 - Patch | |
| References | () https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 - Patch | |
| References | () https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a - Patch |
21 Nov 2024, 06:35
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff - | |
| References | () https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 - | |
| References | () https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db - | |
| References | () https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d - | |
| References | () https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09 - | |
| References | () https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54 - | |
| References | () https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 - | |
| References | () https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a - |
06 Nov 2024, 20:35
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| Summary |
|
21 May 2024, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-05-21 15:15
Updated : 2025-04-02 14:42
NVD link : CVE-2021-47297
Mitre link : CVE-2021-47297
CVE.ORG link : CVE-2021-47297
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-908
Use of Uninitialized Resource