tipc: fix divide-by-zero in tipc_sk_filter_connect()
Summary
| CVE | CVE-2026-43411 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-08 15:16:52 UTC |
| Updated | 2026-05-12 14:10:27 UTC |
| 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) |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.070210000 (date 2026-05-11)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 600feb0a66a98c6b7f6f02b5f3612e75f9b8540f git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 3bc9998041076ee05d3f312a22cee6b2ca35527f git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 579956f9f297eb1b6a5d24de313f3acccee1f9d5 git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf a360d3815aae1f00dd71b7714a846482e85cc1f7 git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf c2ebfbe63deb7bfd4dc2532bae62a7ed67713272 git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 2754e7b3d64748643df867d1ea6fec522914b635 git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3 git | Not specified |
| CNA | Linux | Linux | affected 6787927475e52f6933e3affce365dabb2aa2fadf 6c5a9baa15de240e747263aba435a0951da8d8d2 git | Not specified |
| CNA | Linux | Linux | affected 4.20 | Not specified |
| CNA | Linux | Linux | unaffected 4.20 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.253 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.203 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.167 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.130 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.78 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.19 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.9 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.