CVE-2025-21758

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2	Patch
https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a	Patch
https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3	Patch
https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373	Patch
https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9	Patch
https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1	Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::

History

No history.

Information

Published : 2025-02-27 03:15

Updated : 2025-11-03 20:17

NVD link : CVE-2025-21758

Mitre link : CVE-2025-21758

CVE.ORG link : CVE-2025-21758

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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