Use after free race between mbind() and vma-locked page fault
CVE-2023-4611

7HIGH

Key Information:

Vendor

Red Hat
Status
Kernel
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
29 August 2023

What is CVE-2023-4611?

A use-after-free vulnerability has been identified in the memory management subsystem of the Linux Kernel, specifically located in mm/mempolicy.c. This issue arises due to a race condition between the mbind() function and VMA-locked page faults, potentially enabling a local attacker to exploit this flaw. The consequences may include system crashes or the unintentional exposure of sensitive kernel information.

Affected Version(s)

Kernel 6.5-rc4

References

https://access.redhat.com/security/cve/CVE-2023-4611
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2227244
issue-trackingx_refsource_REDHAT
https://www.spinics.net/lists/stable-commits/msg310136.html

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2023-4611 : Use after free race between mbind() and vma-locked page fault