{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89501", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.715Z", "datePublished": "2026-09-11T19:43:50.063Z", "dateUpdated": "2026-09-11T19:43:50.063Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:43:50.063Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Hold cpu_buffer::lock when resizing a subbuf\n\nBecause, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page,\nhold cpu_buffer->lock to prevent races with\nring_buffer_alloc_read_page() and ring_buffer_free_read_page()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/ring_buffer.c"], "versions": [{"version": "8e7b58c27b3c567316a51079b375b846f9223bba", "lessThan": "8a496aaa3da6e8d545896c2370c7e617cc931ae2", "status": "affected", "versionType": "git"}, {"version": "8e7b58c27b3c567316a51079b375b846f9223bba", "lessThan": "6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2", "status": "affected", "versionType": "git"}, {"version": "8e7b58c27b3c567316a51079b375b846f9223bba", "lessThan": "bf242baf58de03467f226c8e29554c9495dca7fc", "status": "affected", "versionType": "git"}, {"version": "8e7b58c27b3c567316a51079b375b846f9223bba", "lessThan": "24974bd0da1b47fd56c975533ead50abf754e74d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/ring_buffer.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "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-rc1", "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": "6.8", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2"}, {"url": "https://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2"}, {"url": "https://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc"}, {"url": "https://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d"}], "title": "ring-buffer: Hold cpu_buffer::lock when resizing a subbuf", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/ring_buffer.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8a496aaa3da6e8d545896c2370c7e617cc931ae2", "status": "affected", "version": "8e7b58c27b3c567316a51079b375b846f9223bba", "versionType": "git"}, {"lessThan": "6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2", "status": "affected", "version": "8e7b58c27b3c567316a51079b375b846f9223bba", "versionType": "git"}, {"lessThan": "bf242baf58de03467f226c8e29554c9495dca7fc", "status": "affected", "version": "8e7b58c27b3c567316a51079b375b846f9223bba", "versionType": "git"}, {"lessThan": "24974bd0da1b47fd56c975533ead50abf754e74d", "status": "affected", "version": "8e7b58c27b3c567316a51079b375b846f9223bba", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/ring_buffer.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "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-rc1", "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\nring-buffer: Hold cpu_buffer::lock when resizing a subbuf\n\nBecause, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page,\nhold cpu_buffer->lock to prevent races with\nring_buffer_alloc_read_page() and ring_buffer_free_read_page()."}], "id": "CVE-2026-89501", "lastModified": "2026-09-11T20:19:32.303", "metrics": {}, "published": "2026-09-11T20:19:32.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel ring-buffer: Race condition can lead to system instability", "id": "2532254", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532254"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-413", "details": ["A flaw was found in the Linux kernel's ring-buffer component. A race condition occurs when resizing a sub-buffer without properly holding the `cpu_buffer::lock`. This oversight can lead to concurrency issues with memory allocation and deallocation operations, potentially resulting in system instability or a denial of service."], "name": "CVE-2026-89501", "public_date": "2026-09-11T19:43:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89501\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89501\nhttps://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d\nhttps://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2\nhttps://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2\nhttps://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc"], "threat_severity": "Moderate"}

{}