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I. Basic Information for CVE-2025-21758
Vulnerability Information

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Vulnerability Title
ipv6: mcast: add RCU protection to mld_newpack()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
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 安全漏洞
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mld_newpack函数未使用RCU保护,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 b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 ~ 29fa42197f26a97cde29fa8c40beddf44ea5c8f3 -
LinuxLinux 2.6.26 -
II. Public POCs for CVE-2025-21758
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III. Intelligence Information for CVE-2025-21758
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21758

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