What is CVE-2025-40074?

CVE-2025-40074 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-10-28.

How severe is CVE-2025-40074?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Linux

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().

EPSS: 0.002 (7.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36, 4.13, 0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2025-40074?: CVE-2025-40074 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-10-28.
How severe is CVE-2025-40074?: Critical severity. CVSS v3 base score is 9.8 out of 10.