CVE-2021-47190

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Modify the function to return\na success/error value and then free the memory if insertion didn't\nhappen.\n\nv2. Adds a return -1 when the insertion error occurs in\n perf_env__fetch_btf. This doesn't affect anything as the result is\n never checked."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: perf bpf: Evitar p\u00e9rdida de memoria de perf_env__insert_btf() perf_env__insert_btf() no se inserta si se encuentra un ID de BTF duplicado y esto provoca una p\u00e9rdida de memoria. Modifique la funci\u00f3n para que devuelva un valor de \u00e9xito/error y luego libere la memoria si la inserci\u00f3n no ocurri\u00f3. v2. Agrega un retorno -1 cuando ocurre el error de inserci\u00f3n en perf_env__fetch_btf. Esto no afecta a nada ya que el resultado nunca se verifica."}], "id": "CVE-2021-47190", "lastModified": "2026-06-17T04:16:52.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47190", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:50:08.099272Z", "version": "2.0.3"}}]}, "published": "2024-04-10T19:15:47.617", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: perf bpf: Avoid memory leak from perf_env__insert_btf()", "id": "2274619", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274619"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-401", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nperf bpf: Avoid memory leak from perf_env__insert_btf()\nperf_env__insert_btf() doesn't insert if a duplicate BTF id is\nencountered and this causes a memory leak. Modify the function to return\na success/error value and then free the memory if insertion didn't\nhappen.\nv2. Adds a return -1 when the insertion error occurs in\nperf_env__fetch_btf. This doesn't affect anything as the result is\nnever checked."], "name": "CVE-2021-47190", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47190\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47190\nhttps://lore.kernel.org/linux-cve-announce/2024041034-CVE-2021-47190-0261@gregkh/T"], "threat_severity": "Low"}

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