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."
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (33.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel — versions 5.16
Weakness classification (CWE)
References
- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/ (Exploit, Patch, Vendor Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/ (Patch, Vendor Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/ (Exploit, Patch, 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.