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CVE-2025-38550 is a reference-lifetime flaw in the Linux kernel IPv6 multicast implementation. In mld_del_delrec(), the pmc->idev reference is released before ip6_mc_clear_src() finishes using the referenced object. Premature release can permit use-after-free during multicast source cleanup, potentially causing kernel instability or denial of service. The fix moves the reference release after ip6_mc_clear_src() returns, matching the ordering in mld_clear_delrec().
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A Linux kernel IPv6 multicast reference-lifetime vulnerability: mld_del_delrec() releases the pmc->idev reference before ip6_mc_clear_src() finishes using it. The fix delays that release. The advisory lists a CVSS v3 base score of 7.8 and provides an affected-package update.
A Linux kernel IPv6 multicast (MLD) reference-lifetime flaw in which pmc->idev could be released before it was no longer used in ip6_mc_clear_src(). The affected Google COS kernel packages are csql-kernel-6_1 and lakitu-kernel-6_1 before version 18244.448.43.
A Linux kernel vulnerability in IPv6 multicast handling, addressed by delaying the release of pmc->idev in mld_del_delrec(). Red Hat advisory RHSA-2025:18280 provides kernel update 5.14.0-284.143.1.el9_2 and rates the update Moderate. A reboot is required for the update to take effect. The content does not specify exploitation prerequisites or security impact for this individual vulnerability.
A Linux kernel IPv6 multicast handling flaw involving delayed release of pmc->idev.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.