Vulnerability in Linux Kernel
CVE-2021-45402
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."
EPSS: 0.004 (34.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Linux Linux_kernel — versions 5.16
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Exploit, Patch, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-45402?
- CVE-2021-45402 is a medium-severity vulnerability in Linux Kernel, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.5/10. Published 2022-02-11.
- How severe is CVE-2021-45402?
- Medium severity. CVSS v3 base score is 5.5 out of 10.