CVE-2024-49936

HighCVSS 7.8/10Last modified Aug 4, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

net/xen-netback: prevent UAF in xenvif_flush_hash()

During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free.

Therefore, to solve this, you need to change it to list_for_each_entry_safe.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
LinuxLinux>= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 3c4423b0c4b98213b3438e15061e1d08220e6982; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < a0465723b8581cad27164c9073fd780904cd22d4; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < efcff6ce7467f01f0753609f420333f3f2ceceda; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 143edf098b80669d05245b2f2367dd156a83a2c5; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < d408889d4b54f5501e4becc4dbbb9065143fbf4e; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 54d8639af5568fc41c0e274fc3ec9cf86c59fcbb; >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12
LinuxLinux4.7

References

Timeline

Published
Oct 21, 2024
Last modified
Aug 4, 2026
NVD status
Modified

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CVE-2024-49936: High severity, CVSS 7.8 | Vulnix