{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53221", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T14:19:21.845Z", "datePublished": "2025-09-15T14:21:50.053Z", "dateUpdated": "2026-05-23T15:28:16.750Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:28:16.750Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix memleak due to fentry attach failure\n\nIf it fails to attach fentry, the allocated bpf trampoline image will be\nleft in the system. That can be verified by checking /proc/kallsyms.\n\nThis meamleak can be verified by a simple bpf program as follows:\n\n SEC(\"fentry/trap_init\")\n int fentry_run()\n {\n return 0;\n }\n\nIt will fail to attach trap_init because this function is freed after\nkernel init, and then we can find the trampoline image is left in the\nsystem by checking /proc/kallsyms.\n\n $ tail /proc/kallsyms\n ffffffffc0613000 t bpf_trampoline_6442453466_1 [bpf]\n ffffffffc06c3000 t bpf_trampoline_6442453466_1 [bpf]\n\n $ bpftool btf dump file /sys/kernel/btf/vmlinux | grep \"FUNC 'trap_init'\"\n [2522] FUNC 'trap_init' type_id=119 linkage=static\n\n $ echo $((6442453466 & 0x7fffffff))\n 2522\n\nNote that there are two left bpf trampoline images, that is because the\nlibbpf will fallback to raw tracepoint if -EINVAL is returned." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/trampoline.c" ], "versions": [ { "version": "e21aa341785c679dd409c8cb71f864c00fe6c463", "lessThan": "20109ddd5bea2c24d790debf5d02584ef24c3f5e", "status": "affected", "versionType": "git" }, { "version": "e21aa341785c679dd409c8cb71f864c00fe6c463", "lessThan": "f72c67d1a82dada7d6d504c806e111e913721a30", "status": "affected", "versionType": "git" }, { "version": "e21aa341785c679dd409c8cb71f864c00fe6c463", "lessThan": "6aa27775db63ba8c7c73891c7dfb71ddc230c48d", "status": "affected", "versionType": "git" }, { "version": "e21aa341785c679dd409c8cb71f864c00fe6c463", "lessThan": "108598c39eefbedc9882273ac0df96127a629220", "status": "affected", "versionType": "git" }, { "version": "e21d2b92354b3cd25dd774ebb0f0e52ff04a7861", "status": "affected", "versionType": "git" }, { "version": "85d177f56e5256e14b74a65940f981f6e3e8bb32", "status": "affected", "versionType": "git" }, { "version": "5.10.28", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "5.11.11", "lessThan": "5.12", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/trampoline.c" ], "versions": [ { "version": "5.12", "status": "affected" }, { "version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.39", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3.13", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.4", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "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": "5.12", "versionEndExcluding": "6.1.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.3.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.4.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.28" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/20109ddd5bea2c24d790debf5d02584ef24c3f5e" }, { "url": "https://git.kernel.org/stable/c/f72c67d1a82dada7d6d504c806e111e913721a30" }, { "url": "https://git.kernel.org/stable/c/6aa27775db63ba8c7c73891c7dfb71ddc230c48d" }, { "url": "https://git.kernel.org/stable/c/108598c39eefbedc9882273ac0df96127a629220" } ], "title": "bpf: Fix memleak due to fentry attach failure", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53221", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T17:50:19.613865Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T17:52:59.043Z" } } ] } }