CVE-2022-49436

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/pseries/papr_scm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b073096df4dec70d0436321b7093bad27ae91f9e", "status": "affected", "version": "4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b", "versionType": "git"}, {"lessThan": "0e0946e22f3665d27325d389ff45ade6e93f3678", "status": "affected", "version": "4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/pseries/papr_scm.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": "5.18.*", "status": "unaffected", "version": "5.18.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2", "versionEndExcluding": "5.18.3", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/papr_scm: Fix leaking nvdimm_events_map elements\n\nRight now 'char *' elements allocated for individual 'stat_id' in\n'papr_scm_priv.nvdimm_events_map[]' during papr_scm_pmu_check_events(), get\nleaked in papr_scm_remove() and papr_scm_pmu_register(),\npapr_scm_pmu_check_events() error paths.\n\nAlso individual 'stat_id' arent NULL terminated 'char *' instead they are fixed\n8-byte sized identifiers. However papr_scm_pmu_register() assumes it to be a\nNULL terminated 'char *' and at other places it assumes it to be a\n'papr_scm_perf_stat.stat_id' sized string which is 8-byes in size.\n\nFix this by allocating the memory for papr_scm_priv.nvdimm_events_map to also\ninclude space for 'stat_id' entries. This is possible since number of available\nevents/stat_ids are known upfront. This saves some memory and one extra level of\nindirection from 'nvdimm_events_map' to 'stat_id'. Also rest of the code\ncan continue to call 'kfree(papr_scm_priv.nvdimm_events_map)' without needing to\niterate over the array and free up individual elements."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/papr_scm: Se soluciona la fuga de elementos nvdimm_events_map En este momento, los elementos 'char *' asignados para el individuo 'stat_id' en 'papr_scm_priv.nvdimm_events_map[]' durante papr_scm_pmu_check_events(), se filtran en las rutas de error papr_scm_remove() y papr_scm_pmu_register(), papr_scm_pmu_check_events(). Adem\u00e1s, los 'stat_id' individuales no son 'char *' terminados en NULL, sino que son identificadores fijos de tama\u00f1o de 8 bytes. Sin embargo, papr_scm_pmu_register() asume que es un 'char *' terminado en NULL y en otros lugares asume que es una cadena de tama\u00f1o 'papr_scm_perf_stat.stat_id' que tiene un tama\u00f1o de 8 bytes. Solucione este problema asignando la memoria para papr_scm_priv.nvdimm_events_map para que tambi\u00e9n incluya espacio para las entradas 'stat_id'. Esto es posible ya que la cantidad de eventos/stat_id disponibles se conoce de antemano. Esto ahorra algo de memoria y un nivel adicional de indirecci\u00f3n de 'nvdimm_events_map' a 'stat_id'. Adem\u00e1s, el resto del c\u00f3digo puede continuar llamando a 'kfree(papr_scm_priv.nvdimm_events_map)' sin necesidad de iterar sobre la matriz y liberar elementos individuales."}], "id": "CVE-2022-49436", "lastModified": "2026-11-05T20:17:06.233", "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-2022-49436", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:45:34.397056Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:20.057", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0e0946e22f3665d27325d389ff45ade6e93f3678"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b073096df4dec70d0436321b7093bad27ae91f9e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: powerpc/papr_scm: Fix leaking nvdimm_events_map elements", "id": "2348241", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348241"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/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:\npowerpc/papr_scm: Fix leaking nvdimm_events_map elements\nRight now 'char *' elements allocated for individual 'stat_id' in\n'papr_scm_priv.nvdimm_events_map[]' during papr_scm_pmu_check_events(), get\nleaked in papr_scm_remove() and papr_scm_pmu_register(),\npapr_scm_pmu_check_events() error paths.\nAlso individual 'stat_id' arent NULL terminated 'char *' instead they are fixed\n8-byte sized identifiers. However papr_scm_pmu_register() assumes it to be a\nNULL terminated 'char *' and at other places it assumes it to be a\n'papr_scm_perf_stat.stat_id' sized string which is 8-byes in size.\nFix this by allocating the memory for papr_scm_priv.nvdimm_events_map to also\ninclude space for 'stat_id' entries. This is possible since number of available\nevents/stat_ids are known upfront. This saves some memory and one extra level of\nindirection from 'nvdimm_events_map' to 'stat_id'. Also rest of the code\ncan continue to call 'kfree(papr_scm_priv.nvdimm_events_map)' without needing to\niterate over the array and free up individual elements."], "name": "CVE-2022-49436", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49436\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49436\nhttps://lore.kernel.org/linux-cve-announce/2025022656-CVE-2022-49436-e924@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-12T22:31:09.598809+00:00", "updated": "2025-07-12T22:31:09.598884+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}