CVE-2026-46027

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 22546729b96fc873b23065dc49e3d73c45cfb874affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 5eedbfd82c2884e0010fdfb3c9446a6ebcadb691affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < f0858e1d5624bb120b198f2a8528f97a9b0ae069affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 6180a296ca65b08a81914805cbc0f78da5f10a1faffected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < ea0b5d0fe96356dce38f98375a57c52a04e13712affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 83bcf9228b0501694fb2589ed1d142855a2887f2affected
LinuxLinux0cfdd8f92cac01afbb12e4500514036a2b78756b < 5a8db80f721deee8e916c2cfdee78decda02ce4faffected
LinuxLinux4.11affected
LinuxLinux0 < 4.11unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References