Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.9, < 5.4.291 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66dPatch
- https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9Patch
- https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879Patch
- https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304Patch
- https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63Patch
- https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28Patch
- https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1Patch
- https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926Patch
- 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-2025-21764?
CVE-2025-21764 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection...
How severe is CVE-2025-21764?
CVE-2025-21764 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-2025-21764?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.