CVE-2025-21758High· 7.8▾ TwilightIn 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() beca…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 3.4 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
14%
Last analysed / modified upstream
5.5 → 7.8
medium → high
14% → 17%
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.
linux_kernel >= 2.6.26, < 5.15.179linux_kernel >= 5.16, < 6.1.129linux_kernel >= 6.2, < 6.6.79linux_kernel >= 6.7, < 6.12.16linux_kernel >= 6.13, < 6.13.4linux_kernel = 6.14Upgrade past the affected range:
linux_kernel 6.13.4Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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