In the Linux kernel, the following vulnerability has been resolved:
sctp: check send stream number after wait_for_sndbuf
This patch fixes a corner case where the asoc out stream count may change
after wait_for_sndbuf.
When the main thread in the client starts a connection, if its out stream
count is set to N while the in stream count in the server is set to N - 2,
another thread in the client keeps sending the msgs with stream number
N - 1, and waits for sndbuf before processing INIT_ACK.
However, after processing INIT_ACK, the out stream count in the client is
shrunk to N - 2, the same to the in stream count in the server. The crash
occurs when the thread waiting for sndbuf is awake and sends the msg in a
non-existing stream(N - 1), the call trace is as below:
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
Call Trace:
<TASK>
sctp_cmd_send_msg net/sctp/sm_sideeffect.c:1114 [inline]
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1777 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
sctp_do_sm+0x197d/0x5310 net/sctp/sm_sideeffect.c:1170
sctp_primitive_SEND+0x9f/0xc0 net/sctp/primitive.c:163
sctp_sendmsg_to_asoc+0x10eb/0x1a30 net/sctp/socket.c:1868
sctp_sendmsg+0x8d4/0x1d90 net/sctp/socket.c:2026
inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825
sock_sendmsg_nosec net/socket.c:722 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:745
The fix is to add an unlikely check for the send stream number after the
thread wakes up from the wait_for_sndbuf.
References
Configurations
Configuration 1 (hide)
|
History
02 Dec 2025, 19:27
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-476 | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/0443fff49d6352160c200064156c25898bd9f58c - Patch | |
| References | () https://git.kernel.org/stable/c/2584024b23552c00d95b50255e47bd18d306d31a - Patch | |
| References | () https://git.kernel.org/stable/c/667eb99cf7c15fe5b0ecefe75cf658e20ef20c9f - Patch | |
| References | () https://git.kernel.org/stable/c/9346a1a21142357972a6f466ba6275ddc54b04ac - Patch | |
| References | () https://git.kernel.org/stable/c/a615e7270318fa0b98bf1ff38daf6cf52d840312 - Patch | |
| References | () https://git.kernel.org/stable/c/b4b6dfad41aaae9e36e44327b18d5cf4b20dd2ce - Patch | |
| References | () https://git.kernel.org/stable/c/d2128636b303aa9cf065055402ee6697409a8837 - Patch |
Information
Published : 2025-09-16 08:15
Updated : 2025-12-02 19:27
NVD link : CVE-2023-53296
Mitre link : CVE-2023-53296
CVE.ORG link : CVE-2023-53296
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference