ipvs: fix integer overflow in ftp helper port/address parsing (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.45 % · percentile 39 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
References
- https://git.kernel.org/stable/c/d02de9a7a7e2484da0cf37e50614840623b98a62
- https://git.kernel.org/stable/c/fc1493c905d7e0bc8830c1d83915cb7831daf1a1
- https://git.kernel.org/stable/c/50cb9b7263a2ed01f7d2f97818a800c2ee05f661
- https://git.kernel.org/stable/c/deaa88fa010ba0dfc554d09e006ddd1ce9945c82
- https://git.kernel.org/stable/c/00bcc6d679262ea42688fba1d7819ea6e56f12ef
- https://git.kernel.org/stable/c/4aed450adaee3a021db27be94c61fe025b0d05ff
- https://git.kernel.org/stable/c/b1908bff0faaa94d55be72da65879cad632e8236
- https://git.kernel.org/stable/c/e625a9477d12baaff4025c5f9989184a907ea8fc
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | Linux |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-81734
- GCVE · GCVE-0-2026-90141
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d02de9a7a7e2484da0cf37e50614840623b98a62 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fc1493c905d7e0bc8830c1d83915cb7831daf1a1 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50cb9b7263a2ed01f7d2f97818a800c2ee05f661 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < deaa88fa010ba0dfc554d09e006ddd1ce9945c82 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 00bcc6d679262ea42688fba1d7819ea6e56f12ef ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4aed450adaee3a021db27be94c61fe025b0d05ff |
| Linux · Linux | affected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |