Description
In the Linux kernel, the following vulnerability has been resolved:
ipvs: avoid out-of-bounds write in ip_vs_nat_icmp
Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access. One such place is ip_vs_nat_icmp where we can write after the validated area.
Fix it by providing ciph argument just like it is done for IPv6 and use ciph->len as offset to the embedded transport header.
Modify some IPv4 header checks by reading the ihl field only once.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3b8f79af0e98f27b932b0b416e9c52b692d31ff9; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3c779b258c9c3c3567af68d4f45c2f751f35bd0e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < be65fa324640c7a95e30b146159a2be5cc73f22e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a69a4b3fff5814d079beff9a1e9d369994b2ed47; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 243d0187ec4c3837b9b0004f18d1068e46115760; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 646922a0379496154e8c8faca4f8e2fd9100cacc |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/243d0187ec4c3837b9b0004f18d1068e46115760
- https://git.kernel.org/stable/c/3b8f79af0e98f27b932b0b416e9c52b692d31ff9
- https://git.kernel.org/stable/c/3c779b258c9c3c3567af68d4f45c2f751f35bd0e
- https://git.kernel.org/stable/c/646922a0379496154e8c8faca4f8e2fd9100cacc
- https://git.kernel.org/stable/c/a69a4b3fff5814d079beff9a1e9d369994b2ed47
- https://git.kernel.org/stable/c/be65fa324640c7a95e30b146159a2be5cc73f22e
Timeline
- Published
- Aug 22, 2026
- Last modified
- Oct 16, 2026
- NVD status
- Received