CVE-2021-47376 Vulnerability Details
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CVE-2021-47376 Metadata Quick Info
CVE Published: 21/05/2024 |
CVE Updated: 04/11/2024 |
CVE Year: 2021
Source: Linux |
Vendor: Linux |
Product: Linux
Status : PUBLISHED
CVE-2021-47376 Description
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 kvmalloc_node+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:kvmalloc_node+0x108/0x110 mm/util.c:597
Call Trace:
kvmalloc include/linux/mm.h:806 [inline]
kvmalloc_array include/linux/mm.h:824 [inline]
kvcalloc include/linux/mm.h:829 [inline]
check_btf_line kernel/bpf/verifier.c:9925 [inline]
check_btf_info kernel/bpf/verifier.c:10049 [inline]
bpf_check+0xd634/0x150d0 kernel/bpf/verifier.c:13759
bpf_prog_load kernel/bpf/syscall.c:2301 [inline]
__sys_bpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587
__do_sys_bpf kernel/bpf/syscall.c:4691 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4689 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4689
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Metrics
CVSS Version: 3.1 |
Base Score: n/a
Vector: n/a
l➤ Exploitability Metrics:
Attack Vector (AV)*
Attack Complexity (AC)*
Privileges Required (PR)*
User Interaction (UI)*
Scope (S)*
l➤ Impact Metrics:
Confidentiality Impact (C)*
Integrity Impact (I)*
Availability Impact (A)*
Weakness Enumeration (CWE)
CWE-ID:
CWE Name:
Source: Linux
Common Attack Pattern Enumeration and Classification (CAPEC)
CAPEC-ID:
CAPEC Description:
Source: NVD (National Vulnerability Database).