CVE-2026-46027
Published May 27, 2026
Modified May 27, 2026
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.
References
Other References
https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f
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.
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.