CVE-2026-90141
Published: September 19, 2026Last modified: October 6, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.3 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | LOW |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.189-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
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