{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80670", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.782Z", "datePublished": "2026-08-28T06:49:11.120Z", "dateUpdated": "2026-08-28T06:49:11.120Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:49:11.120Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf tools: Use perf_env__get_cpu_topology() in machine__resolve()\n\nmachine__resolve() accesses env->cpu[al->cpu].socket_id after checking\nal->cpu >= 0 and env->cpu != NULL, but without validating al->cpu\nagainst env->nr_cpus_avail. Since al->cpu comes from the untrusted\nperf.data sample, a crafted file with a large CPU index causes an\nout-of-bounds heap read.\n\nUse perf_env__get_cpu_topology() which validates both NULL and bounds.\nAlso bounds-check al->cpu before the cast to struct perf_cpu (int16_t):\nwithout this, values like 65536 silently truncate to 0, bypassing the\naccessor's internal check and returning CPU 0's topology."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/perf/util/event.c"], "versions": [{"version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "lessThan": "b9e8406651dcc1c19238aad11861a758683525b4", "status": "affected", "versionType": "git"}, {"version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "lessThan": "eb266a14c16a93eb4db7b56a452d6be93f8bdcd4", "status": "affected", "versionType": "git"}, {"version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "lessThan": "5484b43a0ec8231c36fba6ead654cb72dbba8b8f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/perf/util/event.c"], "versions": [{"version": "4.4", "status": "affected"}, {"version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": "4.4", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b9e8406651dcc1c19238aad11861a758683525b4"}, {"url": "https://git.kernel.org/stable/c/eb266a14c16a93eb4db7b56a452d6be93f8bdcd4"}, {"url": "https://git.kernel.org/stable/c/5484b43a0ec8231c36fba6ead654cb72dbba8b8f"}], "title": "perf tools: Use perf_env__get_cpu_topology() in machine__resolve()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["tools/perf/util/event.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b9e8406651dcc1c19238aad11861a758683525b4", "status": "affected", "version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "versionType": "git"}, {"lessThan": "eb266a14c16a93eb4db7b56a452d6be93f8bdcd4", "status": "affected", "version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "versionType": "git"}, {"lessThan": "5484b43a0ec8231c36fba6ead654cb72dbba8b8f", "status": "affected", "version": "0c4c4debb0adda4c18c158d95031dc2b9f637869", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["tools/perf/util/event.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.4"}, {"lessThan": "4.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "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\nperf tools: Use perf_env__get_cpu_topology() in machine__resolve()\n\nmachine__resolve() accesses env->cpu[al->cpu].socket_id after checking\nal->cpu >= 0 and env->cpu != NULL, but without validating al->cpu\nagainst env->nr_cpus_avail. Since al->cpu comes from the untrusted\nperf.data sample, a crafted file with a large CPU index causes an\nout-of-bounds heap read.\n\nUse perf_env__get_cpu_topology() which validates both NULL and bounds.\nAlso bounds-check al->cpu before the cast to struct perf_cpu (int16_t):\nwithout this, values like 65536 silently truncate to 0, bypassing the\naccessor's internal check and returning CPU 0's topology."}], "id": "CVE-2026-80670", "lastModified": "2026-08-28T08:16:52.317", "metrics": {}, "published": "2026-08-28T08:16:52.317", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5484b43a0ec8231c36fba6ead654cb72dbba8b8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9e8406651dcc1c19238aad11861a758683525b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eb266a14c16a93eb4db7b56a452d6be93f8bdcd4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}