{"cve":"CVE-2021-47376","nvd":{"published":"2024-05-21T15:15:23.380","modified":"2026-06-17T04:17:19.767","status":"Analyzed","description":"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","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514","https://git.kernel.org/stable/c/6345a0bee80139ea00a341c4202ebfd1534b5eb0","https://git.kernel.org/stable/c/93937596e0652d50973f9dc944fea1694ac8cdfd","https://git.kernel.org/stable/c/b5fe7cdfee5901ce5513c30e554d51536e003bde","https://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47376","score":0.00254,"percentile":0.1695,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}