CVE-2025-40074
Critical
Description
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().
SeverityCritical
CVSS9.8
Exploit probability—
Product
Linux
PublishedOct 28, 2025
First seenOct 28, 2025
How to fix
Update
- Linux Linux864155c164654110f68a17a63bd0339754790d67, e150f273cd8ed34ebc6d03758aad95c12fc58337, 684efb2c86c887685f9aa65e1a21b3df6c1f822d, 923e0734c386984d45de508528a7a7ad91d791cc, 6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 ≤ v < 864155c164654110f68a17a63bd0339754790d67, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 ≤ v < e150f273cd8ed34ebc6d03758aad95c12fc58337, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 ≤ v < 684efb2c86c887685f9aa65e1a21b3df6c1f822d, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 ≤ v < 923e0734c386984d45de508528a7a7ad91d791cc, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 ≤ v < 6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8, 4.13 | 864155c164654110f68a17a63bd0339754790d67, e150f273cd8ed34ebc6d03758aad95c12fc58337, 684efb2c86c887685f9aa65e1a21b3df6c1f822d, 923e0734c386984d45de508528a7a7ad91d791cc, 6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8 |
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