CVE-2021-45402
MEDIUMLinux Kernel < 5.16 - Information Disclosure via BPF Verifier Bounds Check
Title source: llmDescription
The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the mov32 instruction, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."
References (3)
Core 3
Core References
Exploit, Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3cf2b61eb06765e27fec6799292d9fb46d0b7e60
Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=e572ff80f05c33cd0cb4860f864f5c9c044280b6
Exploit, Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b1a7288dedc6caf9023f2676b4f5ed34cf0d4029
Scores
CVSS v3
5.5
EPSS
0.0041
EPSS Percentile
32.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-668
Status
published
Products (2)
linux/linux_kernel
5.16 rc1 (5 CPE variants)
linux/linux_kernel
< 5.16
Published
Feb 11, 2022
Tracked Since
Feb 18, 2026