Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.26, < 5.4.291 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594cPatch
- https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1Patch
- https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bccPatch
- https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67Patch
- https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6dPatch
- https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641dPatch
- https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74dPatch
- https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
FAQ
What is CVE-2025-21760?
CVE-2025-21760 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock()...
How severe is CVE-2025-21760?
CVE-2025-21760 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21760?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.