CVE•Published 2025-02-27•Modified 2026-10-15•1 article on news•6 live references•NVD data
CVE-2025-21758Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
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.
Timeline
Published 2025-02-27
Modified 2026-10-15
External references
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vuln:CVE-2025-21758Hosts Shodan has explicitly fingerprinted as vulnerable.
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os:"Linux Kernel"Hosts Shodan identified as running Linux Kernel.
More intel sources (5)
Shodan report
vuln:CVE-2025-21758Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-21758Censys host search filtered to this CVE id.
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CVE-2025-21758Public source-code mentions — fast PoC discovery.
GitHub code
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