CVE-2025-40074

In the Linux kernel, the following vulnerability has been resolved: ipv4: start using dst_dev_rcu() Change icmpv4_xrlim_allow(), ip_defrag() to prevent possible UAF. Change ipmr_prepare_xmit(), ipmr_queue_fwd_xmit(), ip_mr_output(), ipv4_neigh_lookup() to use lockdep enabled dst_dev_rcu().

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-25)

Published

2025-10-28

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/684efb2c86c887685f9aa65e1a21b3df6c1f822d
• https://git.kernel.org/stable/c/6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8
• https://git.kernel.org/stable/c/864155c164654110f68a17a63bd0339754790d67
• https://git.kernel.org/stable/c/923e0734c386984d45de508528a7a7ad91d791cc
• https://git.kernel.org/stable/c/e150f273cd8ed34ebc6d03758aad95c12fc58337

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