{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74636", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.922Z", "datePublished": "2026-08-22T15:32:16.026Z", "dateUpdated": "2026-08-22T15:32:16.026Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:32:16.026Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix race between update_event_fields and, event_define_fields\n\nThe following sequence may leads race between event_define_fields()\nand update_event_fields():\n\n CPU0 (loads module A) CPU1 (loads module B)\n =============================== ===============================\n load_module(A) load_module(B)\n notifier_call_chain notifier_call_chain\n trace_module_notify trace_module_notify\n mutex_lock(&event_mutex) trace_event_update_all()\n trace_module_add_events(A) down_write(&trace_event_sem)\n __register_event(call_A)\n __add_event_to_tracers(call_A)\n event_define_fields(call_A)\n for each f: list_for_each_entry(field,\n list_add(&f->link, &class->fields, link)\n &class->fields) field = class->fields->next;\n\nWhere access to the class->fields is not protected by the event_mutex in\ntrace_event_update_all().\n\nThis produces the following panic:\n Unable to handle kernel access ... at virtual address 0000000000000018\n pc : update_event_fields+0xf8/0x368\n Call trace:\n update_event_fields+0xf8/0x368\n trace_event_update_all+0x7c/0x2b4\n trace_module_notify+0x4c/0x1dc\n notifier_call_chain+0x84/0x168\n blocking_notifier_call_chain_robust+0x64/0xd4\n load_module+0x10c8/0x123c\n __arm64_sys_finit_module+0x230/0x31c\n\nFix by taking event_mutex in trace_event_update_all() before\ntrace_event_sem."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_events.c"], "versions": [{"version": "7c6bd60999f32138e3b73fd97ea11ef47a94de25", "lessThan": "4e39f7b4d9d36508c53e89e6cbc640728df870b5", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "a30d421468300b1e7b2f233136aeb2db8013f555", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "e5f1d301b4bdaa4206db251fdc691f623162b0a8", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "fdeb190b0905a6aaed1e5d6adfb8613214748d7d", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "ed49684e69f846bf50b5050651ccdb87cfd152c0", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "f128740f39ab28d1f4ad5bdd10f3e117eec0c374", "status": "affected", "versionType": "git"}, {"version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "lessThan": "c3730b8373bb5059d735509b9e6a00d7eb337d7c", "status": "affected", "versionType": "git"}, {"version": "55defdf935fab9f2989a197aae1042c082d9a343", "status": "affected", "versionType": "git"}, {"version": "0c53a5c80e6e286733381a1d9f255ba4039e2e45", "status": "affected", "versionType": "git"}, {"version": "5.15.33", "lessThan": "5.15.216", "status": "affected", "versionType": "semver"}, {"version": "5.16.19", "lessThan": "5.17", "status": "affected", "versionType": "semver"}, {"version": "5.17.2", "lessThan": "5.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_events.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.15.33", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4e39f7b4d9d36508c53e89e6cbc640728df870b5"}, {"url": "https://git.kernel.org/stable/c/a30d421468300b1e7b2f233136aeb2db8013f555"}, {"url": "https://git.kernel.org/stable/c/e5f1d301b4bdaa4206db251fdc691f623162b0a8"}, {"url": "https://git.kernel.org/stable/c/fdeb190b0905a6aaed1e5d6adfb8613214748d7d"}, {"url": "https://git.kernel.org/stable/c/ed49684e69f846bf50b5050651ccdb87cfd152c0"}, {"url": "https://git.kernel.org/stable/c/f128740f39ab28d1f4ad5bdd10f3e117eec0c374"}, {"url": "https://git.kernel.org/stable/c/c3730b8373bb5059d735509b9e6a00d7eb337d7c"}], "title": "tracing: Fix race between update_event_fields and, event_define_fields", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_events.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4e39f7b4d9d36508c53e89e6cbc640728df870b5", "status": "affected", "version": "7c6bd60999f32138e3b73fd97ea11ef47a94de25", "versionType": "git"}, {"lessThan": "a30d421468300b1e7b2f233136aeb2db8013f555", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"lessThan": "e5f1d301b4bdaa4206db251fdc691f623162b0a8", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"lessThan": "fdeb190b0905a6aaed1e5d6adfb8613214748d7d", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"lessThan": "ed49684e69f846bf50b5050651ccdb87cfd152c0", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"lessThan": "f128740f39ab28d1f4ad5bdd10f3e117eec0c374", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"lessThan": "c3730b8373bb5059d735509b9e6a00d7eb337d7c", "status": "affected", "version": "b3bc8547d3be60898818885f5bf22d0a62e2eb48", "versionType": "git"}, {"status": "affected", "version": "55defdf935fab9f2989a197aae1042c082d9a343", "versionType": "git"}, {"status": "affected", "version": "0c53a5c80e6e286733381a1d9f255ba4039e2e45", "versionType": "git"}, {"lessThan": "5.15.216", "status": "affected", "version": "5.15.33", "versionType": "semver"}, {"lessThan": "5.17", "status": "affected", "version": "5.16.19", "versionType": "semver"}, {"lessThan": "5.18", "status": "affected", "version": "5.17.2", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_events.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ntracing: Fix race between update_event_fields and, event_define_fields\n\nThe following sequence may leads race between event_define_fields()\nand update_event_fields():\n\n CPU0 (loads module A) CPU1 (loads module B)\n =============================== ===============================\n load_module(A) load_module(B)\n notifier_call_chain notifier_call_chain\n trace_module_notify trace_module_notify\n mutex_lock(&event_mutex) trace_event_update_all()\n trace_module_add_events(A) down_write(&trace_event_sem)\n __register_event(call_A)\n __add_event_to_tracers(call_A)\n event_define_fields(call_A)\n for each f: list_for_each_entry(field,\n list_add(&f->link, &class->fields, link)\n &class->fields) field = class->fields->next;\n\nWhere access to the class->fields is not protected by the event_mutex in\ntrace_event_update_all().\n\nThis produces the following panic:\n Unable to handle kernel access ... at virtual address 0000000000000018\n pc : update_event_fields+0xf8/0x368\n Call trace:\n update_event_fields+0xf8/0x368\n trace_event_update_all+0x7c/0x2b4\n trace_module_notify+0x4c/0x1dc\n notifier_call_chain+0x84/0x168\n blocking_notifier_call_chain_robust+0x64/0xd4\n load_module+0x10c8/0x123c\n __arm64_sys_finit_module+0x230/0x31c\n\nFix by taking event_mutex in trace_event_update_all() before\ntrace_event_sem."}], "id": "CVE-2026-74636", "lastModified": "2026-08-22T16:16:36.750", "metrics": {}, "published": "2026-08-22T16:16:36.750", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e39f7b4d9d36508c53e89e6cbc640728df870b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a30d421468300b1e7b2f233136aeb2db8013f555"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3730b8373bb5059d735509b9e6a00d7eb337d7c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5f1d301b4bdaa4206db251fdc691f623162b0a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed49684e69f846bf50b5050651ccdb87cfd152c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f128740f39ab28d1f4ad5bdd10f3e117eec0c374"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fdeb190b0905a6aaed1e5d6adfb8613214748d7d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7c6bd60999f32138e3b73fd97ea11ef47a94de25,4e39f7b4d9d36508c53e89e6cbc640728df870b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,a30d421468300b1e7b2f233136aeb2db8013f555)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,e5f1d301b4bdaa4206db251fdc691f623162b0a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,fdeb190b0905a6aaed1e5d6adfb8613214748d7d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,ed49684e69f846bf50b5050651ccdb87cfd152c0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,f128740f39ab28d1f4ad5bdd10f3e117eec0c374)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b3bc8547d3be60898818885f5bf22d0a62e2eb48,c3730b8373bb5059d735509b9e6a00d7eb337d7c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[55defdf935fab9f2989a197aae1042c082d9a343,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0c53a5c80e6e286733381a1d9f255ba4039e2e45,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.33,5.15.216)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.16.19,5.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.17.2,5.18)"}}], "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": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.216,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.183,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.152,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.104,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.45,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.9,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-22T17:15:04.454659+00:00", "updated": "2026-08-22T19:15:03.345885+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}