CVE-2026-46027 (CVSS 7.5)

Description

In the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available.

Is your site exposed to CVE-2026-46027?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0051

Probability of exploitation

0.39%

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/22546729b96fc873b23065dc49e3d73c45cfb874 https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086 https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691 https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2 https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712 https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069

Frequently Asked Questions

What is CVE-2026-46027? +

In the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-46027? +

CVE-2026-46027 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0051, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-46027? +

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-2026-46027