CVE-2026-90141

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d02de9a7a7e2484da0cf37e50614840623b98a62affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fc1493c905d7e0bc8830c1d83915cb7831daf1a1affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50cb9b7263a2ed01f7d2f97818a800c2ee05f661affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < deaa88fa010ba0dfc554d09e006ddd1ce9945c82affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 00bcc6d679262ea42688fba1d7819ea6e56f12efaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4aed450adaee3a021db27be94c61fe025b0d05ffaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b1908bff0faaa94d55be72da65879cad632e8236affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e625a9477d12baaff4025c5f9989184a907ea8fcaffected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References