Description
In the Linux kernel, the following vulnerability has been resolved:
ipvs: fix integer overflow in ftp helper port/address parsing
ip_vs_ftp_get_addrport() accumulates decimal digits into a __u16 (hport) and into unsigned char (p[]) without checking for overflow. A crafted FTP PASV/EPSV response with an over-long port or address octet wraps the value, so the helper configures the data connection with a truncated port/address.
The netfilter conntrack FTP helper had the same defect, fixed in commit 2b413fc689ba ("netfilter: nf_conntrack_ftp: avoid u16 overflows"). Apply the equivalent fix here: widen the port accumulator to u32 and reject values above 65535, and reject address octets above 255.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d02de9a7a7e2484da0cf37e50614840623b98a62; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fc1493c905d7e0bc8830c1d83915cb7831daf1a1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 50cb9b7263a2ed01f7d2f97818a800c2ee05f661; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < deaa88fa010ba0dfc554d09e006ddd1ce9945c82; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 00bcc6d679262ea42688fba1d7819ea6e56f12ef; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4aed450adaee3a021db27be94c61fe025b0d05ff; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b1908bff0faaa94d55be72da65879cad632e8236; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e625a9477d12baaff4025c5f9989184a907ea8fc |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/00bcc6d679262ea42688fba1d7819ea6e56f12ef
- https://git.kernel.org/stable/c/4aed450adaee3a021db27be94c61fe025b0d05ff
- https://git.kernel.org/stable/c/50cb9b7263a2ed01f7d2f97818a800c2ee05f661
- https://git.kernel.org/stable/c/b1908bff0faaa94d55be72da65879cad632e8236
- https://git.kernel.org/stable/c/d02de9a7a7e2484da0cf37e50614840623b98a62
- https://git.kernel.org/stable/c/deaa88fa010ba0dfc554d09e006ddd1ce9945c82
- https://git.kernel.org/stable/c/e625a9477d12baaff4025c5f9989184a907ea8fc
- https://git.kernel.org/stable/c/fc1493c905d7e0bc8830c1d83915cb7831daf1a1
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received