CVE-2026-90141

ipvs: fix integer overflow in ftp helper port/address parsing

State: Published
Severity: 7.3 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d02de9a7a7e2484da0cf37e50614840623b98a62Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fc1493c905d7e0bc8830c1d83915cb7831daf1a1Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 50cb9b7263a2ed01f7d2f97818a800c2ee05f661Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before deaa88fa010ba0dfc554d09e006ddd1ce9945c82Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 00bcc6d679262ea42688fba1d7819ea6e56f12efAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4aed450adaee3a021db27be94c61fe025b0d05ffAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b1908bff0faaa94d55be72da65879cad632e8236Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e625a9477d12baaff4025c5f9989184a907ea8fcAffected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d02de9a7a7e2484da0cf37e50614840623b98a62Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fc1493c905d7e0bc8830c1d83915cb7831daf1a1Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 50cb9b7263a2ed01f7d2f97818a800c2ee05f661Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before deaa88fa010ba0dfc554d09e006ddd1ce9945c82Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 00bcc6d679262ea42688fba1d7819ea6e56f12efAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4aed450adaee3a021db27be94c61fe025b0d05ffAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b1908bff0faaa94d55be72da65879cad632e8236Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e625a9477d12baaff4025c5f9989184a907ea8fcAffected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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