CVE-2021-47376
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47376
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47376.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47376
- Downstream
- Related
- Published
- 2024-05-21T15:15:23Z
- Modified
- 2025-09-25T15:50:04Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Add oversize check before call kvcalloc()
Commit 7661809d493b ("mm: don't allow oversized kvmalloc() calls") add the oversize check. When the allocation is larger than what kmalloc() supports, the following warning triggered:
WARNING: CPU: 0 PID: 8408 at mm/util.c:597 kvmallocnode+0x108/0x110 mm/util.c:597 Modules linked in: CPU: 0 PID: 8408 Comm: syz-executor221 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvmallocnode+0x108/0x110 mm/util.c:597 Call Trace: kvmalloc include/linux/mm.h:806 [inline] kvmallocarray include/linux/mm.h:824 [inline] kvcalloc include/linux/mm.h:829 [inline] checkbtfline kernel/bpf/verifier.c:9925 [inline] checkbtfinfo kernel/bpf/verifier.c:10049 [inline] bpfcheck+0xd634/0x150d0 kernel/bpf/verifier.c:13759 bpfprogload kernel/bpf/syscall.c:2301 [inline] _sysbpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587 _dosysbpf kernel/bpf/syscall.c:4691 [inline] _sesysbpf kernel/bpf/syscall.c:4689 [inline] _x64sysbpf+0x78/0x90 kernel/bpf/syscall.c:4689 dosyscallx64 arch/x86/entry/common.c:50 [inline] dosyscall64+0x3d/0xb0 arch/x86/entry/common.c:80 entrySYSCALL64after_hwframe+0x44/0xae
- References