CVE-2026-90141 (CVSS 7.3)

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.

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CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0045

Probability of exploitation

0.37%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other 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

Frequently Asked Questions

What is CVE-2026-90141? +

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. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-90141? +

CVE-2026-90141 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0045, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-90141? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-90141