{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50200", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.428Z", "datePublished": "2025-06-18T11:03:42.627Z", "dateUpdated": "2026-08-05T08:57:40.701Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:57:40.701Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: Add boundary check in put_entry()\n\nJust like next_entry(), boundary check is necessary to prevent memory\nout-of-bound access." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached by opening/reading `/sys/fs/selinux/policy` (selinuxfs), which invokes `sel_open_policy` → `security_read_policy` → `policydb_write` → `put_entry`; this is a local syscall/file path, not network-facing.\nAC:L - A local attacker who can open the policy file reliably drives the vulnerable `put_entry` serialize path; no race or other condition outside the attacker's control is required once that access is available.\nPR:L - Access is gated only by SELinux `SECURITY__READ_POLICY` (file mode is world-readable); common deployments grant this to unconfined local users (e.g. Fedora/RHEL `selinux_unconfined_type`), and globally permissive mode also allows any local user.\nUI:N - Exploitation requires no victim action; the attacker opens the selinuxfs policy node themselves.\nS:U - Impact is kernel memory corruption and privilege escalation within the same host security authority; this is not a VM/IOMMU/sandbox boundary escape.\nC:H - Missing bounds check yields an out-of-bounds write into the vmalloc policy buffer (and `fp->len` underflow enables further corruption), which can be leveraged for arbitrary kernel memory disclosure primitives.\nI:H - `put_entry` performs `memcpy` into `fp->data` without verifying remaining length, so a serialize overrun is a kernel out-of-bounds write usable for integrity compromise and control-flow hijacking.\nA:H - The same out-of-bounds write / length underflow can oops or panic the kernel, so availability impact is high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/selinux/ss/policydb.h" ], "versions": [ { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "2dabe6a872a5744865372eb30ea51e8ccd21305a", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "477722f31ad73aa779154d1d7e00825538389f76", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "90bdf50ae70c5571a277b5601e4f5df210831e0a", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "adbfdaacde18faf6cd4e490764045375266b3fbd", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "7363a69d8ca8f0086f8e1196c8ddaf0e168614b1", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "9605f50157cae00eb299e1189a6d708c84935ad8", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "dedd558d9765b72c66e5a53948e9f5abc3ece1f6", "status": "affected", "versionType": "git" }, { "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "15ec76fb29be31df2bccb30fc09875274cba2776", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/selinux/ss/policydb.h" ], "versions": [ { "version": "2.6.37", "status": "affected" }, { "version": "0", "lessThan": "2.6.37", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.291", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.256", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.211", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.137", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "2.6.37", "versionEndExcluding": "4.14.291" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "4.19.256" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.4.211" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.10.137" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.15.61" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.18.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.19.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2dabe6a872a5744865372eb30ea51e8ccd21305a" }, { "url": "https://git.kernel.org/stable/c/477722f31ad73aa779154d1d7e00825538389f76" }, { "url": "https://git.kernel.org/stable/c/90bdf50ae70c5571a277b5601e4f5df210831e0a" }, { "url": "https://git.kernel.org/stable/c/adbfdaacde18faf6cd4e490764045375266b3fbd" }, { "url": "https://git.kernel.org/stable/c/7363a69d8ca8f0086f8e1196c8ddaf0e168614b1" }, { "url": "https://git.kernel.org/stable/c/9605f50157cae00eb299e1189a6d708c84935ad8" }, { "url": "https://git.kernel.org/stable/c/dedd558d9765b72c66e5a53948e9f5abc3ece1f6" }, { "url": "https://git.kernel.org/stable/c/15ec76fb29be31df2bccb30fc09875274cba2776" } ], "title": "selinux: Add boundary check in put_entry()", "x_generator": { "engine": "bippy-1.2.0" } } } }