CVE-2026-89740

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89740", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.761Z", "datePublished": "2026-09-11T19:46:47.250Z", "dateUpdated": "2026-10-30T12:32:53.898Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:32:53.898Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: imx: serialize imx_uart_ports[] lifetime\n\nimx_uart_probe() publishes its devm-allocated port in imx_uart_ports[]\nbefore uart_add_one_port() because console setup uses the table. The entry\nis not cleared when adding the port fails or after removal, leaving a\ndangling pointer.\n\nA sibling probe can register the shared console through that stale entry.\nThis was reproduced under KASAN on QEMU mcimx6ul-evk by unbinding a\nsibling UART, unbinding the console UART and rebinding the sibling.\n\nKeep the entry valid through uart_remove_one_port(), then clear it. Protect\nport addition and removal together with their table updates so sibling\noperations cannot interleave. Reject an occupied slot rather than\nclobbering an active port during a duplicate-line probe."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/imx.c"], "versions": [{"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "ce9c074868d5c8adfb0c72de4324138d6fa1a1a8", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "a4acf2739434a014cdfc282175cffd3e35a97fa4", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "abc17fd508a511669997e48f8b014d8aa043abdf", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "681696ae9e4a28bdf54893c807dfe4a6c08e30a5", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "28b932202fcdbeb2ef58d89ce4363f480433c234", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "7429dce56a73bc080a8c072edb167106f73a08ae", "status": "affected", "versionType": "git"}, {"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "lessThan": "8b0b29fdcb47907ae0296b8fe829e918e05e300f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/imx.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ce9c074868d5c8adfb0c72de4324138d6fa1a1a8"}, {"url": "https://git.kernel.org/stable/c/a4acf2739434a014cdfc282175cffd3e35a97fa4"}, {"url": "https://git.kernel.org/stable/c/abc17fd508a511669997e48f8b014d8aa043abdf"}, {"url": "https://git.kernel.org/stable/c/681696ae9e4a28bdf54893c807dfe4a6c08e30a5"}, {"url": "https://git.kernel.org/stable/c/28b932202fcdbeb2ef58d89ce4363f480433c234"}, {"url": "https://git.kernel.org/stable/c/7429dce56a73bc080a8c072edb167106f73a08ae"}, {"url": "https://git.kernel.org/stable/c/8b0b29fdcb47907ae0296b8fe829e918e05e300f"}], "title": "serial: imx: serialize imx_uart_ports[] lifetime", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/serial/imx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ce9c074868d5c8adfb0c72de4324138d6fa1a1a8", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "a4acf2739434a014cdfc282175cffd3e35a97fa4", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "abc17fd508a511669997e48f8b014d8aa043abdf", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "681696ae9e4a28bdf54893c807dfe4a6c08e30a5", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "28b932202fcdbeb2ef58d89ce4363f480433c234", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "7429dce56a73bc080a8c072edb167106f73a08ae", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}, {"lessThan": "8b0b29fdcb47907ae0296b8fe829e918e05e300f", "status": "affected", "version": "dbff4e9ea2e83fda89143389bfb229cb29425a32", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/serial/imx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.27"}, {"lessThan": "2.6.27", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: imx: serialize imx_uart_ports[] lifetime\n\nimx_uart_probe() publishes its devm-allocated port in imx_uart_ports[]\nbefore uart_add_one_port() because console setup uses the table. The entry\nis not cleared when adding the port fails or after removal, leaving a\ndangling pointer.\n\nA sibling probe can register the shared console through that stale entry.\nThis was reproduced under KASAN on QEMU mcimx6ul-evk by unbinding a\nsibling UART, unbinding the console UART and rebinding the sibling.\n\nKeep the entry valid through uart_remove_one_port(), then clear it. Protect\nport addition and removal together with their table updates so sibling\noperations cannot interleave. Reject an occupied slot rather than\nclobbering an active port during a duplicate-line probe."}], "id": "CVE-2026-89740", "lastModified": "2026-10-30T13:20:27.883", "metrics": {}, "published": "2026-09-11T20:20:04.597", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28b932202fcdbeb2ef58d89ce4363f480433c234"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/681696ae9e4a28bdf54893c807dfe4a6c08e30a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7429dce56a73bc080a8c072edb167106f73a08ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b0b29fdcb47907ae0296b8fe829e918e05e300f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a4acf2739434a014cdfc282175cffd3e35a97fa4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abc17fd508a511669997e48f8b014d8aa043abdf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce9c074868d5c8adfb0c72de4324138d6fa1a1a8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel serial: imx: Dangling pointer due to uncleared port entry can lead to memory corruption", "id": "2532424", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532424"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's `serial: imx` component. The `imx_uart_probe()` function publishes a device-managed allocated port in the `imx_uart_ports[]` array before it is fully added. If the port addition fails or the port is removed, the entry in the array is not properly cleared, resulting in a dangling pointer. This stale entry can then be used by a sibling probe to register a shared console, potentially leading to memory corruption and system instability or a denial of service."], "name": "CVE-2026-89740", "public_date": "2026-09-11T19:46:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89740\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89740\nhttps://git.kernel.org/stable/c/28b932202fcdbeb2ef58d89ce4363f480433c234\nhttps://git.kernel.org/stable/c/681696ae9e4a28bdf54893c807dfe4a6c08e30a5\nhttps://git.kernel.org/stable/c/7429dce56a73bc080a8c072edb167106f73a08ae\nhttps://git.kernel.org/stable/c/8b0b29fdcb47907ae0296b8fe829e918e05e300f"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dbff4e9ea2e83fda89143389bfb229cb29425a32,681696ae9e4a28bdf54893c807dfe4a6c08e30a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dbff4e9ea2e83fda89143389bfb229cb29425a32,28b932202fcdbeb2ef58d89ce4363f480433c234)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dbff4e9ea2e83fda89143389bfb229cb29425a32,7429dce56a73bc080a8c072edb167106f73a08ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dbff4e9ea2e83fda89143389bfb229cb29425a32,8b0b29fdcb47907ae0296b8fe829e918e05e300f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.27"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.27)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T10:30:13.417531+00:00", "title": "Dangling Pointer in i.MX UART Driver Allows Kernel Memory Corruption", "updated": "2026-09-15T19:30:12.131360+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}