ipv4: start using dst_dev_rcu()
Priority MEDIUM 42Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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().
Why it matters now
EPSS 0.00461 40th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.189, 6.6.157, 6.12.106 +2Red Hat: 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.189, 6.6.157, 6.12.106, 6.17.3, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40074
- 2026-10-03 Alias added: GHSA-g35w-4vfx-hjpg
- 2026-10-03 Fix available: Linux/[email protected], Linux/Linux@864155c164654110f68a17a63bd0339754790d67 · CNA
- 2026-10-03 1 new reference · CNA
References
Other 5
- 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
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- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2025-40074 · CVE Program
- CVE-2025-40074 · NVD
- FIRST EPSS
- GHSA-g35w-4vfx-hjpg · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40074 · Red Hat security data · CC BY 4.0
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