PT-2024-7598 · Linux+7 · Linux Kernel+7
Jeongjun Park
·
Published
2024-08-28
·
Updated
2025-09-29
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CVE-2024-49936
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.58
Description
The issue is related to a use-after-free (UAF) vulnerability in the
xenvif flush hash() function. This occurs because kfree rcu is called outside the RCU read critical section during the list for each entry rcu iteration, leading to UAF when accessing head->next after the entry becomes free. The vulnerability may allow an attacker to impact the confidentiality, integrity, and availability of protected information.Recommendations
To resolve the issue, update the Linux kernel to version 6.6.58 or later.
As a temporary workaround, consider modifying the
xenvif flush hash() function to use list for each entry safe instead of list for each entry rcu to prevent the UAF vulnerability.Exploit
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu