In the Linux kernel, the following vulnerability has been resolved:
tipc: fix divide-by-zero in tipc_sk_filter_connect()
A user can set conn_timeout to any value via
setsockopt(TIPC_CONN_TIMEOUT), including values less than 4. When a
SYN is rejected with TIPC_ERR_OVERLOAD and the retry path in
tipc_sk_filter_connect() executes:
delay %= (tsk->conn_timeout / 4);
If conn_timeout is in the range [0, 3], the integer division yields 0,
and the modulo operation triggers a divide-by-zero exception, causing a
kernel oops/panic.
Fix this by clamping conn_timeout to a minimum of 4 at the point of use
in tipc_sk_filter_connect().
Oops: divide error: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+
RIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)
Call Trace:
tipc_sk_backlog_rcv (include/linux/instrumented.h:82 include/linux/atomic/atomic-instrumented.h:32 include/net/sock.h:2357 net/tipc/socket.c:2406)
__release_sock (include/net/sock.h:1185 net/core/sock.c:3213)
release_sock (net/core/sock.c:3797)
tipc_connect (net/tipc/socket.c:2570)
__sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)
References
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 18:13
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-369 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635 - Patch | |
| References | () https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3 - Patch | |
| References | () https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f - Patch | |
| References | () https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5 - Patch | |
| References | () https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f - Patch | |
| References | () https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2 - Patch | |
| References | () https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7 - Patch | |
| References | () https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272 - Patch |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-21 18:13
NVD link : CVE-2026-43411
Mitre link : CVE-2026-43411
CVE.ORG link : CVE-2026-43411
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-369
Divide By Zero