{"api_version":"1","generated_at":"2026-05-12T20:58:18+00:00","cve":"CVE-2026-43411","urls":{"html":"https://cve.report/CVE-2026-43411","api":"https://cve.report/api/cve/CVE-2026-43411.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43411","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43411"},"summary":{"title":"tipc: fix divide-by-zero in tipc_sk_filter_connect()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix divide-by-zero in tipc_sk_filter_connect()\n\nA user can set conn_timeout to any value via\nsetsockopt(TIPC_CONN_TIMEOUT), including values less than 4.  When a\nSYN is rejected with TIPC_ERR_OVERLOAD and the retry path in\ntipc_sk_filter_connect() executes:\n\n    delay %= (tsk->conn_timeout / 4);\n\nIf conn_timeout is in the range [0, 3], the integer division yields 0,\nand the modulo operation triggers a divide-by-zero exception, causing a\nkernel oops/panic.\n\nFix this by clamping conn_timeout to a minimum of 4 at the point of use\nin tipc_sk_filter_connect().\n\nOops: divide error: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+\nRIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)\nCall Trace:\n 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)\n __release_sock (include/net/sock.h:1185 net/core/sock.c:3213)\n release_sock (net/core/sock.c:3797)\n tipc_connect (net/tipc/socket.c:2570)\n __sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:52","updated_at":"2026-05-12 14:10:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5","name":"https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3","name":"https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2","name":"https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7","name":"https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635","name":"https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f","name":"https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272","name":"https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f","name":"https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43411","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43411","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 600feb0a66a98c6b7f6f02b5f3612e75f9b8540f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 3bc9998041076ee05d3f312a22cee6b2ca35527f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 579956f9f297eb1b6a5d24de313f3acccee1f9d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf a360d3815aae1f00dd71b7714a846482e85cc1f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf c2ebfbe63deb7bfd4dc2532bae62a7ed67713272 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 2754e7b3d64748643df867d1ea6fec522914b635 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6787927475e52f6933e3affce365dabb2aa2fadf 6c5a9baa15de240e747263aba435a0951da8d8d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.20","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.253 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.19 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43411","cve":"CVE-2026-43411","epss":"0.000240000","percentile":"0.070210000","score_date":"2026-05-11","updated_at":"2026-05-12 00:01:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/tipc/socket.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"600feb0a66a98c6b7f6f02b5f3612e75f9b8540f","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"3bc9998041076ee05d3f312a22cee6b2ca35527f","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"579956f9f297eb1b6a5d24de313f3acccee1f9d5","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"a360d3815aae1f00dd71b7714a846482e85cc1f7","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"c2ebfbe63deb7bfd4dc2532bae62a7ed67713272","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"2754e7b3d64748643df867d1ea6fec522914b635","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"},{"lessThan":"6c5a9baa15de240e747263aba435a0951da8d8d2","status":"affected","version":"6787927475e52f6933e3affce365dabb2aa2fadf","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/tipc/socket.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.20"},{"lessThan":"4.20","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.19","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.20","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix divide-by-zero in tipc_sk_filter_connect()\n\nA user can set conn_timeout to any value via\nsetsockopt(TIPC_CONN_TIMEOUT), including values less than 4.  When a\nSYN is rejected with TIPC_ERR_OVERLOAD and the retry path in\ntipc_sk_filter_connect() executes:\n\n    delay %= (tsk->conn_timeout / 4);\n\nIf conn_timeout is in the range [0, 3], the integer division yields 0,\nand the modulo operation triggers a divide-by-zero exception, causing a\nkernel oops/panic.\n\nFix this by clamping conn_timeout to a minimum of 4 at the point of use\nin tipc_sk_filter_connect().\n\nOops: divide error: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+\nRIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)\nCall Trace:\n 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)\n __release_sock (include/net/sock.h:1185 net/core/sock.c:3213)\n release_sock (net/core/sock.c:3797)\n tipc_connect (net/tipc/socket.c:2570)\n __sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)"}],"providerMetadata":{"dateUpdated":"2026-05-11T22:24:04.295Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f"},{"url":"https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f"},{"url":"https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5"},{"url":"https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7"},{"url":"https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272"},{"url":"https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635"},{"url":"https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3"},{"url":"https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2"}],"title":"tipc: fix divide-by-zero in tipc_sk_filter_connect()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43411","datePublished":"2026-05-08T14:21:49.543Z","dateReserved":"2026-05-01T14:12:56.008Z","dateUpdated":"2026-05-11T22:24:04.295Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:52","lastModifiedDate":"2026-05-12 14:10:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43411","Ordinal":"1","Title":"tipc: fix divide-by-zero in tipc_sk_filter_connect()","CVE":"CVE-2026-43411","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43411","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix divide-by-zero in tipc_sk_filter_connect()\n\nA user can set conn_timeout to any value via\nsetsockopt(TIPC_CONN_TIMEOUT), including values less than 4.  When a\nSYN is rejected with TIPC_ERR_OVERLOAD and the retry path in\ntipc_sk_filter_connect() executes:\n\n    delay %= (tsk->conn_timeout / 4);\n\nIf conn_timeout is in the range [0, 3], the integer division yields 0,\nand the modulo operation triggers a divide-by-zero exception, causing a\nkernel oops/panic.\n\nFix this by clamping conn_timeout to a minimum of 4 at the point of use\nin tipc_sk_filter_connect().\n\nOops: divide error: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+\nRIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)\nCall Trace:\n 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)\n __release_sock (include/net/sock.h:1185 net/core/sock.c:3213)\n release_sock (net/core/sock.c:3797)\n tipc_connect (net/tipc/socket.c:2570)\n __sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)","Type":"Description","Title":"tipc: fix divide-by-zero in tipc_sk_filter_connect()"}]}}}