{"api_version":"1","generated_at":"2026-07-23T11:01:29+00:00","cve":"CVE-2026-23239","urls":{"html":"https://cve.report/CVE-2026-23239","api":"https://cve.report/api/cve/CVE-2026-23239.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23239","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23239"},"summary":{"title":"espintcp: Fix race condition in espintcp_close()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nespintcp: Fix race condition in espintcp_close()\n\nThis issue was discovered during a code audit.\n\nAfter cancel_work_sync() is called from espintcp_close(),\nespintcp_tx_work() can still be scheduled from paths such as\nthe Delayed ACK handler or ksoftirqd.\nAs a result, the espintcp_tx_work() worker may dereference a\nfreed espintcp ctx or sk.\n\nThe following is a simple race scenario:\n\n           cpu0                             cpu1\n\n  espintcp_close()\n    cancel_work_sync(&ctx->work);\n                                     espintcp_write_space()\n                                       schedule_work(&ctx->work);\n\nTo prevent this race condition, cancel_work_sync() is\nreplaced with disable_work_sync().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-03-10 18:18:13","updated_at":"2026-05-20 19:27:54"},"problem_types":["CWE-362"],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c","name":"https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b","name":"https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8","name":"https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994","name":"https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23239","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23239","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 f7ad8b1d0e421c524604d5076b73232093490d5c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 664e9df53226b4505a0894817ecad2c610ab11d8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 022ff7f347588de6e17879a1da6019647b21321b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 e1512c1db9e8794d8d130addd2615ec27231d994 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nespintcp: Fix race condition in espintcp_close()\n\nThis issue was discovered during a code audit.\n\nAfter cancel_work_sync() is called from espintcp_close(),\nespintcp_tx_work() can still be scheduled from paths such as\nthe Delayed ACK handler or ksoftirqd.\nAs a result, the espintcp_tx_work() worker may dereference a\nfreed espintcp ctx or sk.\n\nThe following is a simple race scenario:\n\n           cpu0                             cpu1\n\n  espintcp_close()\n    cancel_work_sync(&ctx->work);\n                                     espintcp_write_space()\n                                       schedule_work(&ctx->work);\n\nTo prevent this race condition, cancel_work_sync() is\nreplaced with disable_work_sync()."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-11T22:03:00.906Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c"},{"url":"https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8"},{"url":"https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b"},{"url":"https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994"}],"title":"espintcp: Fix race condition in espintcp_close()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23239","datePublished":"2026-03-10T17:28:26.190Z","dateReserved":"2026-01-13T15:37:45.989Z","dateUpdated":"2026-05-11T22:03:00.906Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-10 18:18:13","lastModifiedDate":"2026-05-20 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Fix race condition in espintcp_close()","CVE":"CVE-2026-23239","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23239","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nespintcp: Fix race condition in espintcp_close()\n\nThis issue was discovered during a code audit.\n\nAfter cancel_work_sync() is called from espintcp_close(),\nespintcp_tx_work() can still be scheduled from paths such as\nthe Delayed ACK handler or ksoftirqd.\nAs a result, the espintcp_tx_work() worker may dereference a\nfreed espintcp ctx or sk.\n\nThe following is a simple race scenario:\n\n           cpu0                             cpu1\n\n  espintcp_close()\n    cancel_work_sync(&ctx->work);\n                                     espintcp_write_space()\n                                       schedule_work(&ctx->work);\n\nTo prevent this race condition, cancel_work_sync() is\nreplaced with disable_work_sync().","Type":"Description","Title":"espintcp: Fix race condition in espintcp_close()"}]}}}