{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47376", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:58:30.811Z", "datePublished": "2024-05-21T15:03:39.738Z", "dateUpdated": "2026-05-11T13:53:30.823Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:53:30.823Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add oversize check before call kvcalloc()\n\nCommit 7661809d493b (\"mm: don't allow oversized kvmalloc() calls\") add the\noversize check. When the allocation is larger than what kmalloc() supports,\nthe following warning triggered:\n\nWARNING: CPU: 0 PID: 8408 at mm/util.c:597 kvmalloc_node+0x108/0x110 mm/util.c:597\nModules linked in:\nCPU: 0 PID: 8408 Comm: syz-executor221 Not tainted 5.14.0-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:kvmalloc_node+0x108/0x110 mm/util.c:597\nCall Trace:\n kvmalloc include/linux/mm.h:806 [inline]\n kvmalloc_array include/linux/mm.h:824 [inline]\n kvcalloc include/linux/mm.h:829 [inline]\n check_btf_line kernel/bpf/verifier.c:9925 [inline]\n check_btf_info kernel/bpf/verifier.c:10049 [inline]\n bpf_check+0xd634/0x150d0 kernel/bpf/verifier.c:13759\n bpf_prog_load kernel/bpf/syscall.c:2301 [inline]\n __sys_bpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587\n __do_sys_bpf kernel/bpf/syscall.c:4691 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:4689 [inline]\n __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4689\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/verifier.c" ], "versions": [ { "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35", "lessThan": "93937596e0652d50973f9dc944fea1694ac8cdfd", "status": "affected", "versionType": "git" }, { "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35", "lessThan": "6345a0bee80139ea00a341c4202ebfd1534b5eb0", "status": "affected", "versionType": "git" }, { "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35", "lessThan": "b5fe7cdfee5901ce5513c30e554d51536e003bde", "status": "affected", "versionType": "git" }, { "version": "c454a46b5efd8eff8880e88ece2976e60a26bf35", "lessThan": "0e6491b559704da720f6da09dd0a52c4df44c514", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/verifier.c" ], "versions": [ { "version": "5.0", "status": "affected" }, { "version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.150", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.70", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.14.9", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15", "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": "5.0", "versionEndExcluding": "5.4.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.10.70" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.14.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/93937596e0652d50973f9dc944fea1694ac8cdfd" }, { "url": "https://git.kernel.org/stable/c/6345a0bee80139ea00a341c4202ebfd1534b5eb0" }, { "url": "https://git.kernel.org/stable/c/b5fe7cdfee5901ce5513c30e554d51536e003bde" }, { "url": "https://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514" } ], "title": "bpf: Add oversize check before call kvcalloc()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-11T18:56:40.431373Z", "id": "CVE-2021-47376", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-11T18:57:16.694Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.600Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/93937596e0652d50973f9dc944fea1694ac8cdfd", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6345a0bee80139ea00a341c4202ebfd1534b5eb0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b5fe7cdfee5901ce5513c30e554d51536e003bde", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514", "tags": [ "x_transferred" ] } ] } ] } }