CVE-2021-45402

Advisory lineage Upstream: 0 Downstream: 10
Modified
Published: 11 Feb 2022, 14:36
Last modified:04 Aug 2024, 04:39

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.07% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

11 Feb 2022, 14:36
Published
Vulnerability first disclosed
04 Aug 2024, 04:39
Last Modified
Vulnerability information updated

Description

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."

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.07%• Percentile: 21%

Techniques & Countermeasures

  • CWE-668•Exposure of Resource to Wrong Sphere

    The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.

Affected Systems

  • linux•linux_kernel

    < 5.16 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3 | 5.16:rc4 | 5.16:rc5

References (3)