{"api_version":"1","generated_at":"2026-10-21T19:44:19+00:00","cve":"CVE-2026-98742","urls":{"html":"https://cve.report/CVE-2026-98742","api":"https://cve.report/api/cve/CVE-2026-98742.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98742","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98742"},"summary":{"title":"ALSA: seq: Serialize compat port-info ioctls","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: Serialize compat port-info ioctls\n\nThe native sequencer ioctl path serializes handler calls with\nclient->ioctl_mutex, but the translated port-info compat path invokes the\nsame handlers through snd_seq_kernel_client_ctl() without taking that\nmutex.\n\nThis lets concurrent compat CREATE_PORT requests pass the port-count\ncheck before any request reaches the serialized insertion. The computed\ninteger port index can then exceed the address field range and wrap to an\nexisting index. Subsequent subscriber teardown can resolve the duplicate\naddress to the wrong port and access a freed subscriber.\n\nTake ioctl_mutex while dispatching converted port-info requests, matching\nthe native ioctl path. All translated port-info commands share this\nhelper, so their accesses to the client port state are serialized as\nwell.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:27","updated_at":"2026-10-21 13:21:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c","name":"https://git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650","name":"https://git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4","name":"https://git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341","name":"https://git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2db234e163f0d211b69a4eebbec8aacc5a54a80e","name":"https://git.kernel.org/stable/c/2db234e163f0d211b69a4eebbec8aacc5a54a80e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98742","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98742","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b3defb791b26ea0683a93a4f49c77ec45ec96f10 2db234e163f0d211b69a4eebbec8aacc5a54a80e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b3defb791b26ea0683a93a4f49c77ec45ec96f10 413211dd31cb2ef2fc99fb0aa1a037a97509502c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b3defb791b26ea0683a93a4f49c77ec45ec96f10 fc5c52848e405b6efb073db5035bb9ebaed11ec4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b3defb791b26ea0683a93a4f49c77ec45ec96f10 702d92f361f65d9698c473c7599d471395dc4341 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/core/seq/seq_compat.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2db234e163f0d211b69a4eebbec8aacc5a54a80e","status":"affected","version":"b3defb791b26ea0683a93a4f49c77ec45ec96f10","versionType":"git"},{"lessThan":"413211dd31cb2ef2fc99fb0aa1a037a97509502c","status":"affected","version":"b3defb791b26ea0683a93a4f49c77ec45ec96f10","versionType":"git"},{"lessThan":"fc5c52848e405b6efb073db5035bb9ebaed11ec4","status":"affected","version":"b3defb791b26ea0683a93a4f49c77ec45ec96f10","versionType":"git"},{"lessThan":"702d92f361f65d9698c473c7599d471395dc4341","status":"affected","version":"b3defb791b26ea0683a93a4f49c77ec45ec96f10","versionType":"git"},{"lessThan":"95b2e0361c88753afa030c10698be0a1a5b67650","status":"affected","version":"b3defb791b26ea0683a93a4f49c77ec45ec96f10","versionType":"git"},{"status":"affected","version":"d6693160906d55ba376bf0b88b7c129762170162","versionType":"git"},{"status":"affected","version":"02cbce8576a31df8fca54aaec91ee081076bd79d","versionType":"git"},{"status":"affected","version":"6aab3aa52366a0051e5abf8aae4616c42053fd8e","versionType":"git"},{"status":"affected","version":"f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c","versionType":"git"},{"status":"affected","version":"623e5c8ae32b39cc8baea83478695dc624935318","versionType":"git"},{"status":"affected","version":"e4ff9f294629b65df3f7982cd4faf86b2856b9d7","versionType":"git"},{"status":"affected","version":"c3162384aed4cfe3f1a1f40041f3ba8cd7704d88","versionType":"git"},{"lessThan":"3.3","status":"affected","version":"3.2.99","versionType":"semver"},{"lessThan":"3.17","status":"affected","version":"3.16.54","versionType":"semver"},{"lessThan":"3.19","status":"affected","version":"3.18.94","versionType":"semver"},{"lessThan":"4.2","status":"affected","version":"4.1.50","versionType":"semver"},{"lessThan":"4.5","status":"affected","version":"4.4.115","versionType":"semver"},{"lessThan":"4.10","status":"affected","version":"4.9.78","versionType":"semver"},{"lessThan":"4.15","status":"affected","version":"4.14.15","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/core/seq/seq_compat.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.15"},{"lessThan":"4.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.99","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.54","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18.94","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1.50","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.115","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.78","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: Serialize compat port-info ioctls\n\nThe native sequencer ioctl path serializes handler calls with\nclient->ioctl_mutex, but the translated port-info compat path invokes the\nsame handlers through snd_seq_kernel_client_ctl() without taking that\nmutex.\n\nThis lets concurrent compat CREATE_PORT requests pass the port-count\ncheck before any request reaches the serialized insertion. The computed\ninteger port index can then exceed the address field range and wrap to an\nexisting index. Subsequent subscriber teardown can resolve the duplicate\naddress to the wrong port and access a freed subscriber.\n\nTake ioctl_mutex while dispatching converted port-info requests, matching\nthe native ioctl path. All translated port-info commands share this\nhelper, so their accesses to the client port state are serialized as\nwell."}],"providerMetadata":{"dateUpdated":"2026-10-21T12:56:17.857Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2db234e163f0d211b69a4eebbec8aacc5a54a80e"},{"url":"https://git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c"},{"url":"https://git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4"},{"url":"https://git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341"},{"url":"https://git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650"}],"title":"ALSA: seq: Serialize compat port-info ioctls","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98742","datePublished":"2026-10-18T15:47:27.137Z","dateReserved":"2026-09-25T10:25:14.367Z","dateUpdated":"2026-10-21T12:56:17.857Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:27","lastModifiedDate":"2026-10-21 13:21:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98742","Ordinal":"1","Title":"ALSA: seq: Serialize compat port-info ioctls","CVE":"CVE-2026-98742","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98742","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: Serialize compat port-info ioctls\n\nThe native sequencer ioctl path serializes handler calls with\nclient->ioctl_mutex, but the translated port-info compat path invokes the\nsame handlers through snd_seq_kernel_client_ctl() without taking that\nmutex.\n\nThis lets concurrent compat CREATE_PORT requests pass the port-count\ncheck before any request reaches the serialized insertion. The computed\ninteger port index can then exceed the address field range and wrap to an\nexisting index. Subsequent subscriber teardown can resolve the duplicate\naddress to the wrong port and access a freed subscriber.\n\nTake ioctl_mutex while dispatching converted port-info requests, matching\nthe native ioctl path. All translated port-info commands share this\nhelper, so their accesses to the client port state are serialized as\nwell.","Type":"Description","Title":"ALSA: seq: Serialize compat port-info ioctls"}]}}}