Critical 9.8Published Oct 28, 2025

CVE-2025-40074ipv4: start using dst_dev_rcu()

Updated under an hour ago (Oct 27, 2026, 7:00 AM ET)

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Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 864155c164654110f68a17a63bd0339754790d67; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before e150f273cd8ed34ebc6d03758aad95c12fc58337; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 684efb2c86c887685f9aa65e1a21b3df6c1f822d; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 923e0734c386984d45de508528a7a7ad91d791cc; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.