{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64402", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.785Z", "datePublished": "2026-07-25T08:50:45.075Z", "dateUpdated": "2026-07-25T08:50:45.075Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:50:45.075Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ultrasoc-smb: Fix OOB write in smb_sync_perf_buffer()\n\nWhen the SMB sink is used as a perf AUX sink, smb_update_buffer() calls\nsmb_sync_perf_buffer() to copy hardware trace data into the perf AUX ring\nbuffer pages. It derives pg_idx = head >> PAGE_SHIFT from @head, which is\nhandle->head, and indexes dst_pages[pg_idx]. The pg_idx %= nr_pages\nnormalization is only applied after the first loop iteration.\n\nThis leaves the initial page index underived from the buffer size, which\ncan result in an out-of-bounds write past dst_pages[] when head exceeds\nthe AUX buffer size.\n\nNormalize head modulo the AUX buffer size before deriving the page index\nand offset, mirroring tmc_etr_sync_perf_buffer()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwtracing/coresight/ultrasoc-smb.c"], "versions": [{"version": "06f5c2926aaa0fba7f99678da6ef77cbbbda1441", "lessThan": "38dbc8db8341ccdf8e1e1a067453d33ad751864b", "status": "affected", "versionType": "git"}, {"version": "06f5c2926aaa0fba7f99678da6ef77cbbbda1441", "lessThan": "4c5a0a946373da99a80398289b28845b5ae40cd1", "status": "affected", "versionType": "git"}, {"version": "06f5c2926aaa0fba7f99678da6ef77cbbbda1441", "lessThan": "661a019ac0413ecec9e5d1dfcc12fbca8e78d5fb", "status": "affected", "versionType": "git"}, {"version": "06f5c2926aaa0fba7f99678da6ef77cbbbda1441", "lessThan": "daf6246ab988fc8bdc82ad7c8d0b1c182d11b15f", "status": "affected", "versionType": "git"}, {"version": "06f5c2926aaa0fba7f99678da6ef77cbbbda1441", "lessThan": "98495b5a4d77dd22e106f462b76e1093a55b29a7", "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/hwtracing/coresight/ultrasoc-smb.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-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": "6.3", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/38dbc8db8341ccdf8e1e1a067453d33ad751864b"}, {"url": "https://git.kernel.org/stable/c/4c5a0a946373da99a80398289b28845b5ae40cd1"}, {"url": "https://git.kernel.org/stable/c/661a019ac0413ecec9e5d1dfcc12fbca8e78d5fb"}, {"url": "https://git.kernel.org/stable/c/daf6246ab988fc8bdc82ad7c8d0b1c182d11b15f"}, {"url": "https://git.kernel.org/stable/c/98495b5a4d77dd22e106f462b76e1093a55b29a7"}], "title": "coresight: ultrasoc-smb: Fix OOB write in smb_sync_perf_buffer()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06f5c2926aaa0fba7f99678da6ef77cbbbda1441,38dbc8db8341ccdf8e1e1a067453d33ad751864b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06f5c2926aaa0fba7f99678da6ef77cbbbda1441,4c5a0a946373da99a80398289b28845b5ae40cd1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06f5c2926aaa0fba7f99678da6ef77cbbbda1441,661a019ac0413ecec9e5d1dfcc12fbca8e78d5fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06f5c2926aaa0fba7f99678da6ef77cbbbda1441,daf6246ab988fc8bdc82ad7c8d0b1c182d11b15f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06f5c2926aaa0fba7f99678da6ef77cbbbda1441,98495b5a4d77dd22e106f462b76e1093a55b29a7)"}}], "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": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-07-25T17:45:05.465557+00:00", "updated": "2026-07-25T17:45:05.465592+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}