CVE-2024-49936
net/xen-netback: prevent UAF in xenvif_flush_hash()
Using Linux by Linux?
Get instant alerts when new vulnerabilities affect Linux - before attackers find them.
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12
- https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5
- https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb
- https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4
- https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c
References (10)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Quick Info
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.