GHSA-HCQ4-7CHF-C998
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-18 18:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-90141"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:06Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix integer overflow in ftp helper port/address parsing\n\nip_vs_ftp_get_addrport() accumulates decimal digits into a __u16\n(hport) and into unsigned char (p[]) without checking for overflow.\nA crafted FTP PASV/EPSV response with an over-long port or address\noctet wraps the value, so the helper configures the data connection\nwith a truncated port/address.\n\nThe netfilter conntrack FTP helper had the same defect, fixed in\ncommit 2b413fc689ba (\"netfilter: nf_conntrack_ftp: avoid u16\noverflows\"). Apply the equivalent fix here: widen the port accumulator\nto u32 and reject values above 65535, and reject address octets above\n255.",
"id": "GHSA-hcq4-7chf-c998",
"modified": "2026-09-18T18:31:27Z",
"published": "2026-09-17T18:31:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90141"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/00bcc6d679262ea42688fba1d7819ea6e56f12ef"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4aed450adaee3a021db27be94c61fe025b0d05ff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/50cb9b7263a2ed01f7d2f97818a800c2ee05f661"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b1908bff0faaa94d55be72da65879cad632e8236"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d02de9a7a7e2484da0cf37e50614840623b98a62"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/deaa88fa010ba0dfc554d09e006ddd1ce9945c82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e625a9477d12baaff4025c5f9989184a907ea8fc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc1493c905d7e0bc8830c1d83915cb7831daf1a1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
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|---|
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