CVE-2026-43411None▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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)
Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 600feb0a66a98c6b7f6f02b5f3612e75f9b8540fLinux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 3bc9998041076ee05d3f312a22cee6b2ca35527fLinux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 579956f9f297eb1b6a5d24de313f3acccee1f9d5Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < a360d3815aae1f00dd71b7714a846482e85cc1f7Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < c2ebfbe63deb7bfd4dc2532bae62a7ed67713272Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 2754e7b3d64748643df867d1ea6fec522914b635Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3Linux >= 6787927475e52f6933e3affce365dabb2aa2fadf < 6c5a9baa15de240e747263aba435a0951da8d8d2Linux 4.20Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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