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VULNERABILITIES

CVE-2021-45402 Details

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."

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3cf2b61eb06765e27fec6799292d9fb46d0b7e60 CVEExploitPatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b1a7288dedc6caf9023f2676b4f5ed34cf0d4029 CVEExploitPatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=e572ff80f05c33cd0cb4860f864f5c9c044280b6 CVEPatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3cf2b61eb06765e27fec6799292d9fb46d0b7e60 [email protected]ExploitPatchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b1a7288dedc6caf9023f2676b4f5ed34cf0d4029 [email protected]ExploitPatchVendor Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-668Exposure of Resource to Wrong Sphere[email protected]

Affected Products

ProductVersions
linux linux kernel
< 5.16
5.16 rc1
5.16 rc2
5.16 rc3
5.16 rc4

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-45402
NVD Published Date:
Feb 11, 2022
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-45402 Details - Not Deferred