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)

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
6787927475e52f6933e3affce365dabb2aa2fadf affected < 600feb0a66a98c6b7f6f02b5f3612e75f9b8540f
6787927475e52f6933e3affce365dabb2aa2fadf affected < 3bc9998041076ee05d3f312a22cee6b2ca35527f
6787927475e52f6933e3affce365dabb2aa2fadf affected < 579956f9f297eb1b6a5d24de313f3acccee1f9d5
6787927475e52f6933e3affce365dabb2aa2fadf affected < a360d3815aae1f00dd71b7714a846482e85cc1f7
6787927475e52f6933e3affce365dabb2aa2fadf affected < c2ebfbe63deb7bfd4dc2532bae62a7ed67713272
6787927475e52f6933e3affce365dabb2aa2fadf affected < 2754e7b3d64748643df867d1ea6fec522914b635
6787927475e52f6933e3affce365dabb2aa2fadf affected < 338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3
6787927475e52f6933e3affce365dabb2aa2fadf affected < 6c5a9baa15de240e747263aba435a0951da8d8d2
Linux Linux affected
Version Status Constraints
4.20 affected —
0 unaffected < 4.20
5.10.253 unaffected ≤ 5.10.*
5.15.203 unaffected ≤ 5.15.*
6.1.167 unaffected ≤ 6.1.*
6.6.130 unaffected ≤ 6.6.*
6.12.78 unaffected ≤ 6.12.*
6.18.19 unaffected ≤ 6.18.*
6.19.9 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635 cve-icon cve-icon
https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3 cve-icon cve-icon
https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f cve-icon cve-icon
https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5 cve-icon cve-icon
https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f cve-icon cve-icon
https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2 cve-icon cve-icon
https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7 cve-icon cve-icon
https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272 cve-icon cve-icon
History

Fri, 08 May 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-369

Fri, 08 May 2026 14:45:00 +0000

Type Values Removed Values Added
Description 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)
Title tipc: fix divide-by-zero in tipc_sk_filter_connect()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-08T14:21:49.543Z

Reserved: 2026-05-01T14:12:56.008Z

Link: CVE-2026-43411

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-08T15:16:52.880

Modified: 2026-05-08T15:16:52.880

Link: CVE-2026-43411

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T18:15:13Z

Weaknesses