CVE-2025-38550

In the Linux kernel, the following vulnerability has been resolved:

ipv6: mcast: Delay put pmc->idev in mld_del_delrec()

pmc->idev is still used in ip6_mc_clear_src(), so as mld_clear_delrec() does, the reference should be put after ip6_mc_clear_src() return.

An IPv6 MLD bookkeeping bug freed pmc->idev before it was used in ip6_mc_clear_src(), causing a use-after-free in the multicast code path. A remote attacker on the same L2 segment could potentially trigger a kernel crash via crafted MLD activity, leading to DoS.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.