In the Linux kernel, the following vulnerability has been resolved:
sctp: handle the error returned from sctp_auth_asoc_init_active_key
When it returns an error from sctp_auth_asoc_init_active_key(), the
active_key is actually not updated. The old sh_key will be freeed
while it's still used as active key in asoc. Then an use-after-free
will be triggered when sending patckets, as found by syzbot:
sctp_auth_shkey_hold+0x22/0xa0 net/sctp/auth.c:112
sctp_set_owner_w net/sctp/socket.c:132 [inline]
sctp_sendmsg_to_asoc+0xbd5/0x1a20 net/sctp/socket.c:1863
sctp_sendmsg+0x1053/0x1d50 net/sctp/socket.c:2025
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
This patch is to fix it by not replacing the sh_key when it returns
errors from sctp_auth_asoc_init_active_key() in sctp_auth_set_key().
For sctp_auth_set_active_key(), old active_key_id will be set back
to asoc->active_key_id when the same thing happens.
References
Configurations
Configuration 1 (hide)
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History
24 Nov 2025, 20:04
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:5.14:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CWE | CWE-416 | |
| References | () https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11 - Patch | |
| References | () https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1 - Patch | |
| References | () https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552 - Patch | |
| References | () https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612 - Patch | |
| References | () https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d - Patch | |
| References | () https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40 - Patch | |
| References | () https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e - Patch |
Information
Published : 2025-09-15 14:15
Updated : 2025-11-24 20:04
NVD link : CVE-2022-50243
Mitre link : CVE-2022-50243
CVE.ORG link : CVE-2022-50243
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free