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I. Basic Information for CVE-2025-21791
Vulnerability Information

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Vulnerability Title
vrf: use RCU protection in l3mdev_l3_out()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞,该漏洞源于未使用RCU保护l3mdev_l3_out函数,可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
LinuxLinux a8e3e1a9f02094145580ea7920c6a1d9aabd5539 ~ 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e -
LinuxLinux 4.9 -
II. Public POCs for CVE-2025-21791
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III. Intelligence Information for CVE-2025-21791
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21791

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