CVE-2022-48996

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In the case, DAMON sysfs interface is supposed to\nupdate, remove, or add schemes to reflect the sysfs files. However, the\ncode is assuming the DAMON context wouldn't have schemes at all, and\ntherefore creates and adds new schemes. As a result, the code doesn't\nwork as intended for online schemes tuning and could have more than\nexpected memory footprint. The schemes are all in the DAMON context, so\nit doesn't leak the memory, though.\n\nRemove the wrong asssumption (the DAMON context wouldn't have schemes) in\n'damon_sysfs_set_schemes()' to fix the bug."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/damon/sysfs: se corrige la suposici\u00f3n incorrecta de esquemas vac\u00edos durante el ajuste en l\u00ednea en damon_sysfs_set_schemes(). el commit da87878010e5 (\"mm/damon/sysfs: soporte para la actualizaci\u00f3n de entradas en l\u00ednea\") hizo que se llamara a 'damon_sysfs_set_schemes()' para ejecutar el contexto DAMON, que podr\u00eda tener esquemas. En este caso, se supone que la interfaz sysfs de DAMON actualiza, elimina o agrega esquemas para reflejar los archivos sysfs. Sin embargo, el c\u00f3digo asume que el contexto DAMON no tendr\u00eda esquemas en absoluto y, por lo tanto, crea y agrega nuevos esquemas. Como resultado, el c\u00f3digo no funciona como se esperaba para el ajuste de esquemas en l\u00ednea y podr\u00eda tener una huella de memoria mayor a la esperada. Todos los esquemas est\u00e1n en el contexto DAMON, por lo que no pierde memoria. Elimine la suposici\u00f3n incorrecta (el contexto DAMON no tendr\u00eda esquemas) en 'damon_sysfs_set_schemes()' para corregir el error."}], "id": "CVE-2022-48996", "lastModified": "2026-06-17T05:16:48.450", "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-2022-48996", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T13:15:49.578394Z", "version": "2.0.3"}}]}, "published": "2024-10-21T20:15:11.423", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95bc35f9bee5220dad4e8567654ab3288a181639"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f98d1f2a36ad7ab48fb4cf73ca14e7b19482fd4d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()", "id": "2320737", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320737"}, "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-672", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()\nCommit da87878010e5 (\"mm/damon/sysfs: support online inputs update\") made\n'damon_sysfs_set_schemes()' to be called for running DAMON context, which\ncould have schemes. In the case, DAMON sysfs interface is supposed to\nupdate, remove, or add schemes to reflect the sysfs files. However, the\ncode is assuming the DAMON context wouldn't have schemes at all, and\ntherefore creates and adds new schemes. As a result, the code doesn't\nwork as intended for online schemes tuning and could have more than\nexpected memory footprint. The schemes are all in the DAMON context, so\nit doesn't leak the memory, though.\nRemove the wrong asssumption (the DAMON context wouldn't have schemes) in\n'damon_sysfs_set_schemes()' to fix the bug."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2022-48996", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48996\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48996\nhttps://lore.kernel.org/linux-cve-announce/2024102149-CVE-2022-48996-e9ca@gregkh/T"], "statement": "Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.", "threat_severity": "Moderate"}

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