CVE-2022-49890

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for tmpbuf */\n |-- value = krealloc(*xattr_value, error + 1, flags)\n | /* ^^^ alloc memory */\n |-- error = handler->get(handler, ...)\n | /* error! */\n |-- *xattr_value = value\n | /* xattr_value is &tmpbuf (memory leak!) */\n\nSo we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it.\n\n[PM: subject line and backtrace tweaks]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/commoncap.c"], "versions": [{"version": "8db6c34f1dbc8e06aa016a9b829b06902c3e1340", "lessThan": "6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85", "status": "affected", "versionType": "git"}, {"version": "8db6c34f1dbc8e06aa016a9b829b06902c3e1340", "lessThan": "90577bcc01c4188416a47269f8433f70502abe98", "status": "affected", "versionType": "git"}, {"version": "8db6c34f1dbc8e06aa016a9b829b06902c3e1340", "lessThan": "0c3e6288da650d1ec911a259c77bc2d88e498603", 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"https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98"}, {"url": "https://git.kernel.org/stable/c/0c3e6288da650d1ec911a259c77bc2d88e498603"}, {"url": "https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906"}, {"url": "https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1"}, {"url": "https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d"}, {"url": "https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee"}], "title": "capabilities: fix potential memleak on error path from vfs_getxattr_alloc()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-401", "lang": "en", "description": "CWE-401 Missing Release of Memory after Effective Lifetime"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": 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*/\n |-- *xattr_value = value\n | /* xattr_value is &tmpbuf (memory leak!) */\n\nSo we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it.\n\n[PM: subject line and backtrace tweaks]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: capacidades: reparar posible fuga de memoria en la ruta de error de vfs_getxattr_alloc() En cap_inode_getsecurity(), utilizaremos vfs_getxattr_alloc() para completar la asignaci\u00f3n de memoria de tmpbuf, si hemos completado la asignaci\u00f3n de memoria de tmpbuf, pero no pudimos llamar a handler->get(...), habr\u00e1 una fuga de memoria en la siguiente l\u00f3gica: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ asignar para tmpbuf */ |-- valor = krealloc(*xattr_value, error + 1, flags) | /* ^^^ asignar memoria */ |-- error = handler->get(handler, ...) | /* \u00a1error! */ |-- *xattr_value = valor | /* xattr_value es &tmpbuf (\u00a1p\u00e9rdida de memoria!) */ Intentaremos liberar (tmpbuf) despu\u00e9s de que vfs_getxattr_alloc() no pueda solucionarlo. [MP: l\u00ednea de asunto y ajustes de backtrace]"}], "id": "CVE-2022-49890", "lastModified": "2026-06-17T05:19:26.050", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49890", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T16:08:33.672566Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:14.000", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c3e6288da650d1ec911a259c77bc2d88e498603"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-401"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: capabilities: fix potential memleak on error path from vfs_getxattr_alloc()", "id": "2363448", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363448"}, "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:\ncapabilities: fix potential memleak on error path from vfs_getxattr_alloc()\nIn cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to\ncomplete the memory allocation of tmpbuf, if we have completed\nthe memory allocation of tmpbuf, but failed to call handler->get(...),\nthere will be a memleak in below logic:\n|-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...)\n| /* ^^^ alloc for tmpbuf */\n|-- value = krealloc(*xattr_value, error + 1, flags)\n| /* ^^^ alloc memory */\n|-- error = handler->get(handler, ...)\n| /* error! */\n|-- *xattr_value = value\n| /* xattr_value is &tmpbuf (memory leak!) */\nSo we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it.\n[PM: subject line and backtrace tweaks]"], "name": "CVE-2022-49890", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49890\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49890\nhttps://lore.kernel.org/linux-cve-announce/2025050157-CVE-2022-49890-345f@gregkh/T"], "threat_severity": "Moderate"}

{}