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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2025-21759

ipv6: mcast: extend RCU protection in igmp6_send()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF. 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 638e8fe3563a82f298fe537a28d5342a97278cf1affected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 6901bbb169e3add6c037218d996790cef6b3d650affected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 7e0a818ecc4d62e7fb668ea02de0bfe8ba0b7dffaffected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 81b25a07ebf53f9ef4ca8f3d96a8ddb94561dd5aaffected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 0bf8e2f3768629d437a32cb824149e6e98254381affected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 8e92d6a413feaf968a33f0b439ecf27404407458affected
  • b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to < 087c1faa594fa07a66933d750c0b2610aa1a2946affected

Linux Linux

Default version status: affected

  • 2.6.26affected
  • 0 to < 2.6.26unaffected
  • 5.10.271 to ≤ 5.10.*unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.79 to ≤ 6.6.*unaffected
  • 6.12.16 to ≤ 6.12.*unaffected
  • 6.13.4 to ≤ 6.13.*unaffected
  • 6.14 to ≤ *unaffected

References