Vulnerability · Published Feb 27, 2025 · Assigned by Linux
CVE-2025-21763neighbour: use RCU protection in __neigh_notify()
High 7.8
In plain English
A high-severity use-after-free in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 82.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: neighbour: use RCU protection in __neigh_notify() __neigh_notify() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.129-1 | DEBIAN-CVE-2025-21763 |
| Debian:13 | linux | 6.12.16-1 | DEBIAN-CVE-2025-21763 |
| Debian:14 | linux | 6.12.16-1 | DEBIAN-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux | 5.15.0-140.150 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux | 6.8.0-78.78 | USN-7703-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-78.78 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1084.91 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1035.37 | USN-7703-1 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1035.37 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1035.37~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1035.37~22.04.1 | USN-7703-2 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1089.98 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1034.39 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1015.15~24.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1034.39~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1089.98.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1022.23 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1083.92 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1036.38 | USN-7703-2 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1036.38 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1015.15~24.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1036.38~22.04.1 | USN-7703-2 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1036.38~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1081.87 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1032.36 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1032.36 | USN-7703-4 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1066.74 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1019.21 | USN-7703-2 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1019.21 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-26.26~24.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-78.78~22.04.1 | USN-7703-4 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-78.78~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1076.79 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1033.33 | USN-7703-2 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1033.33 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1033.33~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1033.33~22.04.1 | USN-7703-2 |
| Ubuntu:24.04:LTS | linux-intel | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1079.85 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1080.85 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-140.150 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-78.78.1 | USN-7703-1 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-78.78.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1014.15~24.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-78.78.1~22.04.1 | USN-7703-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-78.78.1~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1078.79 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1035.38 | USN-7703-4 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1035.38 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 6.11.0-1010.10 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1035.38~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1035.38~22.04.1 | USN-7703-4 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1035.38.1 | USN-7703-4 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1035.38.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1037.37 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1009.9 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1026.26 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1022.22 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1081.87 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1032.33 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1032.33 | USN-7703-3 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1032.33~22.04.1 | USN-7703-3 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1032.33~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1078.81 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1035.39 | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1035.39 | USN-7703-4 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-78.78~22.04.1 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-21763 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1017.18 | UBUNTU-CVE-2025-21763 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1050.54 | UBUNTU-CVE-2025-21763 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 426b5303eb435d98b9bee37a807be386bc2b3320 – before e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32426b5303eb435d98b9bee37a807be386bc2b3320 – before 8666e9aab801328c1408a19fbf4070609dc0695a426b5303eb435d98b9bee37a807be386bc2b3320 – before 40d8f2f2a373b6c294ffac394d2bb814b572ead1426b5303eb435d98b9bee37a807be386bc2b3320 – before 784eb2376270e086f7db136d154b8404edacf97b426b5303eb435d98b9bee37a807be386bc2b3320 – before 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379426b5303eb435d98b9bee37a807be386bc2b3320 – before cdd5c2a12ddad8a77ce1838ff9f29aa587de82df426b5303eb435d98b9bee37a807be386bc2b3320 – before 559307d25235e24b5424778c7332451b6c741159426b5303eb435d98b9bee37a807be386bc2b3320 – before becbd5850c03ed33b232083dd66c6e38c0c0e569 |
| Linux | Linux | 2.6.25 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://git.kernel.org/stable/c/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32
- https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a
- https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1
- https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b
- https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379
- https://git.kernel.org/stable/c/cdd5c2a12ddad8a77ce1838ff9f29aa587de82df
- https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159
- https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html